if.c revision 1.309 1 1.309 roy /* $NetBSD: if.c,v 1.309 2015/04/07 23:30:36 roy Exp $ */
2 1.53 thorpej
3 1.53 thorpej /*-
4 1.219 ad * Copyright (c) 1999, 2000, 2001, 2008 The NetBSD Foundation, Inc.
5 1.53 thorpej * All rights reserved.
6 1.53 thorpej *
7 1.53 thorpej * This code is derived from software contributed to The NetBSD Foundation
8 1.150 peter * by William Studenmund and Jason R. Thorpe.
9 1.53 thorpej *
10 1.53 thorpej * Redistribution and use in source and binary forms, with or without
11 1.53 thorpej * modification, are permitted provided that the following conditions
12 1.53 thorpej * are met:
13 1.53 thorpej * 1. Redistributions of source code must retain the above copyright
14 1.53 thorpej * notice, this list of conditions and the following disclaimer.
15 1.53 thorpej * 2. Redistributions in binary form must reproduce the above copyright
16 1.53 thorpej * notice, this list of conditions and the following disclaimer in the
17 1.53 thorpej * documentation and/or other materials provided with the distribution.
18 1.53 thorpej *
19 1.53 thorpej * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 1.53 thorpej * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 1.53 thorpej * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 1.53 thorpej * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 1.53 thorpej * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 1.53 thorpej * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 1.53 thorpej * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 1.53 thorpej * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 1.53 thorpej * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 1.53 thorpej * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 1.53 thorpej * POSSIBILITY OF SUCH DAMAGE.
30 1.53 thorpej */
31 1.49 itojun
32 1.49 itojun /*
33 1.49 itojun * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
34 1.49 itojun * All rights reserved.
35 1.154 perry *
36 1.49 itojun * Redistribution and use in source and binary forms, with or without
37 1.49 itojun * modification, are permitted provided that the following conditions
38 1.49 itojun * are met:
39 1.49 itojun * 1. Redistributions of source code must retain the above copyright
40 1.49 itojun * notice, this list of conditions and the following disclaimer.
41 1.49 itojun * 2. Redistributions in binary form must reproduce the above copyright
42 1.49 itojun * notice, this list of conditions and the following disclaimer in the
43 1.49 itojun * documentation and/or other materials provided with the distribution.
44 1.49 itojun * 3. Neither the name of the project nor the names of its contributors
45 1.49 itojun * may be used to endorse or promote products derived from this software
46 1.49 itojun * without specific prior written permission.
47 1.154 perry *
48 1.49 itojun * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
49 1.49 itojun * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 1.49 itojun * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 1.49 itojun * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
52 1.49 itojun * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 1.49 itojun * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 1.49 itojun * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 1.49 itojun * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 1.49 itojun * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 1.49 itojun * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 1.49 itojun * SUCH DAMAGE.
59 1.49 itojun */
60 1.16 cgd
61 1.1 cgd /*
62 1.15 mycroft * Copyright (c) 1980, 1986, 1993
63 1.15 mycroft * The Regents of the University of California. All rights reserved.
64 1.1 cgd *
65 1.1 cgd * Redistribution and use in source and binary forms, with or without
66 1.1 cgd * modification, are permitted provided that the following conditions
67 1.1 cgd * are met:
68 1.1 cgd * 1. Redistributions of source code must retain the above copyright
69 1.1 cgd * notice, this list of conditions and the following disclaimer.
70 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright
71 1.1 cgd * notice, this list of conditions and the following disclaimer in the
72 1.1 cgd * documentation and/or other materials provided with the distribution.
73 1.126 agc * 3. Neither the name of the University nor the names of its contributors
74 1.1 cgd * may be used to endorse or promote products derived from this software
75 1.1 cgd * without specific prior written permission.
76 1.1 cgd *
77 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
78 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
79 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
80 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
81 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
82 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
83 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
84 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
85 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
86 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
87 1.1 cgd * SUCH DAMAGE.
88 1.1 cgd *
89 1.44 fvdl * @(#)if.c 8.5 (Berkeley) 1/9/95
90 1.1 cgd */
91 1.99 lukem
92 1.99 lukem #include <sys/cdefs.h>
93 1.309 roy __KERNEL_RCSID(0, "$NetBSD: if.c,v 1.309 2015/04/07 23:30:36 roy Exp $");
94 1.50 thorpej
95 1.308 ozaki #if defined(_KERNEL_OPT)
96 1.50 thorpej #include "opt_inet.h"
97 1.46 thorpej
98 1.51 bouyer #include "opt_atalk.h"
99 1.120 martin #include "opt_natm.h"
100 1.288 ozaki #include "opt_wlan.h"
101 1.308 ozaki #include "opt_net_mpsafe.h"
102 1.308 ozaki #endif
103 1.1 cgd
104 1.8 mycroft #include <sys/param.h>
105 1.8 mycroft #include <sys/mbuf.h>
106 1.8 mycroft #include <sys/systm.h>
107 1.59 thorpej #include <sys/callout.h>
108 1.15 mycroft #include <sys/proc.h>
109 1.8 mycroft #include <sys/socket.h>
110 1.8 mycroft #include <sys/socketvar.h>
111 1.56 thorpej #include <sys/domain.h>
112 1.8 mycroft #include <sys/protosw.h>
113 1.8 mycroft #include <sys/kernel.h>
114 1.8 mycroft #include <sys/ioctl.h>
115 1.133 jonathan #include <sys/sysctl.h>
116 1.159 dyoung #include <sys/syslog.h>
117 1.165 elad #include <sys/kauth.h>
118 1.254 dyoung #include <sys/kmem.h>
119 1.276 rmind #include <sys/xcall.h>
120 1.1 cgd
121 1.8 mycroft #include <net/if.h>
122 1.8 mycroft #include <net/if_dl.h>
123 1.66 onoe #include <net/if_ether.h>
124 1.124 dyoung #include <net/if_media.h>
125 1.132 dyoung #include <net80211/ieee80211.h>
126 1.132 dyoung #include <net80211/ieee80211_ioctl.h>
127 1.8 mycroft #include <net/if_types.h>
128 1.24 christos #include <net/radix.h>
129 1.53 thorpej #include <net/route.h>
130 1.95 itojun #include <net/netisr.h>
131 1.262 christos #include <sys/module.h>
132 1.51 bouyer #ifdef NETATALK
133 1.51 bouyer #include <netatalk/at_extern.h>
134 1.51 bouyer #include <netatalk/at.h>
135 1.51 bouyer #endif
136 1.143 itojun #include <net/pfil.h>
137 1.278 he #include <netinet/in.h>
138 1.276 rmind #include <netinet/in_var.h>
139 1.1 cgd
140 1.49 itojun #ifdef INET6
141 1.72 thorpej #include <netinet6/in6_var.h>
142 1.108 itojun #include <netinet6/nd6.h>
143 1.49 itojun #endif
144 1.117 thorpej
145 1.288 ozaki #include "ether.h"
146 1.288 ozaki #include "fddi.h"
147 1.288 ozaki #include "token.h"
148 1.288 ozaki
149 1.166 liamjfoy #include "carp.h"
150 1.166 liamjfoy #if NCARP > 0
151 1.166 liamjfoy #include <netinet/ip_carp.h>
152 1.166 liamjfoy #endif
153 1.166 liamjfoy
154 1.186 christos #include <compat/sys/sockio.h>
155 1.161 christos #include <compat/sys/socket.h>
156 1.161 christos
157 1.117 thorpej MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
158 1.117 thorpej MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
159 1.49 itojun
160 1.274 rmind /*
161 1.274 rmind * Global list of interfaces.
162 1.274 rmind */
163 1.274 rmind struct ifnet_head ifnet_list;
164 1.274 rmind static ifnet_t ** ifindex2ifnet = NULL;
165 1.274 rmind
166 1.274 rmind static u_int if_index = 1;
167 1.274 rmind static size_t if_indexlim = 0;
168 1.274 rmind static uint64_t index_gen;
169 1.274 rmind static kmutex_t index_gen_mtx;
170 1.292 christos static kmutex_t if_clone_mtx;
171 1.274 rmind
172 1.274 rmind static struct ifaddr ** ifnet_addrs = NULL;
173 1.274 rmind
174 1.274 rmind struct ifnet *lo0ifp;
175 1.1 cgd int ifqmaxlen = IFQ_MAXLEN;
176 1.104 matt
177 1.192 dyoung static int if_rt_walktree(struct rtentry *, void *);
178 1.53 thorpej
179 1.163 thorpej static struct if_clone *if_clone_lookup(const char *, int *);
180 1.163 thorpej static int if_clone_list(struct if_clonereq *);
181 1.63 thorpej
182 1.163 thorpej static LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
183 1.163 thorpej static int if_cloners_count;
184 1.63 thorpej
185 1.265 rmind /* Packet filtering hook for interfaces. */
186 1.265 rmind pfil_head_t * if_pfil;
187 1.143 itojun
188 1.239 elad static kauth_listener_t if_listener;
189 1.239 elad
190 1.273 pooka static int doifioctl(struct socket *, u_long, void *, struct lwp *);
191 1.252 dyoung static int ifioctl_attach(struct ifnet *);
192 1.252 dyoung static void ifioctl_detach(struct ifnet *);
193 1.254 dyoung static void ifnet_lock_enter(struct ifnet_lock *);
194 1.254 dyoung static void ifnet_lock_exit(struct ifnet_lock *);
195 1.163 thorpej static void if_detach_queues(struct ifnet *, struct ifqueue *);
196 1.234 dyoung static void sysctl_sndq_setup(struct sysctllog **, const char *,
197 1.234 dyoung struct ifaltq *);
198 1.294 ozaki static void if_slowtimo(void *);
199 1.300 ozaki static void if_free_sadl(struct ifnet *);
200 1.302 ozaki static void if_attachdomain1(struct ifnet *);
201 1.302 ozaki static int ifconf(u_long, void *);
202 1.302 ozaki static int if_clone_create(const char *);
203 1.302 ozaki static int if_clone_destroy(const char *);
204 1.95 itojun
205 1.240 cegger #if defined(INET) || defined(INET6)
206 1.276 rmind static void sysctl_net_pktq_setup(struct sysctllog **, int);
207 1.240 cegger #endif
208 1.237 pooka
209 1.239 elad static int
210 1.239 elad if_listener_cb(kauth_cred_t cred, kauth_action_t action, void *cookie,
211 1.239 elad void *arg0, void *arg1, void *arg2, void *arg3)
212 1.239 elad {
213 1.239 elad int result;
214 1.239 elad enum kauth_network_req req;
215 1.239 elad
216 1.239 elad result = KAUTH_RESULT_DEFER;
217 1.239 elad req = (enum kauth_network_req)arg1;
218 1.239 elad
219 1.239 elad if (action != KAUTH_NETWORK_INTERFACE)
220 1.239 elad return result;
221 1.239 elad
222 1.239 elad if ((req == KAUTH_REQ_NETWORK_INTERFACE_GET) ||
223 1.239 elad (req == KAUTH_REQ_NETWORK_INTERFACE_SET))
224 1.239 elad result = KAUTH_RESULT_ALLOW;
225 1.239 elad
226 1.239 elad return result;
227 1.239 elad }
228 1.239 elad
229 1.1 cgd /*
230 1.1 cgd * Network interface utility routines.
231 1.1 cgd *
232 1.1 cgd * Routines with ifa_ifwith* names take sockaddr *'s as
233 1.1 cgd * parameters.
234 1.1 cgd */
235 1.4 andrew void
236 1.163 thorpej ifinit(void)
237 1.1 cgd {
238 1.276 rmind #if defined(INET)
239 1.276 rmind sysctl_net_pktq_setup(NULL, PF_INET);
240 1.276 rmind #endif
241 1.237 pooka #ifdef INET6
242 1.276 rmind sysctl_net_pktq_setup(NULL, PF_INET6);
243 1.276 rmind #endif
244 1.1 cgd
245 1.239 elad if_listener = kauth_listen_scope(KAUTH_SCOPE_NETWORK,
246 1.239 elad if_listener_cb, NULL);
247 1.273 pooka
248 1.273 pooka /* interfaces are available, inform socket code */
249 1.273 pooka ifioctl = doifioctl;
250 1.227 yamt }
251 1.227 yamt
252 1.227 yamt /*
253 1.227 yamt * XXX Initialization before configure().
254 1.227 yamt * XXX hack to get pfil_add_hook working in autoconf.
255 1.227 yamt */
256 1.227 yamt void
257 1.227 yamt ifinit1(void)
258 1.227 yamt {
259 1.238 skrll mutex_init(&index_gen_mtx, MUTEX_DEFAULT, IPL_NONE);
260 1.292 christos mutex_init(&if_clone_mtx, MUTEX_DEFAULT, IPL_NONE);
261 1.274 rmind TAILQ_INIT(&ifnet_list);
262 1.274 rmind if_indexlim = 8;
263 1.274 rmind
264 1.265 rmind if_pfil = pfil_head_create(PFIL_TYPE_IFNET, NULL);
265 1.265 rmind KASSERT(if_pfil != NULL);
266 1.286 ozaki
267 1.288 ozaki #if NETHER > 0 || NFDDI > 0 || defined(NETATALK) || NTOKEN > 0 || defined(WLAN)
268 1.286 ozaki etherinit();
269 1.288 ozaki #endif
270 1.1 cgd }
271 1.1 cgd
272 1.274 rmind ifnet_t *
273 1.226 christos if_alloc(u_char type)
274 1.226 christos {
275 1.274 rmind return kmem_zalloc(sizeof(ifnet_t), KM_SLEEP);
276 1.226 christos }
277 1.226 christos
278 1.226 christos void
279 1.274 rmind if_free(ifnet_t *ifp)
280 1.251 dyoung {
281 1.274 rmind kmem_free(ifp, sizeof(ifnet_t));
282 1.251 dyoung }
283 1.251 dyoung
284 1.251 dyoung void
285 1.226 christos if_initname(struct ifnet *ifp, const char *name, int unit)
286 1.226 christos {
287 1.226 christos (void)snprintf(ifp->if_xname, sizeof(ifp->if_xname),
288 1.226 christos "%s%d", name, unit);
289 1.226 christos }
290 1.226 christos
291 1.53 thorpej /*
292 1.53 thorpej * Null routines used while an interface is going away. These routines
293 1.53 thorpej * just return an error.
294 1.53 thorpej */
295 1.53 thorpej
296 1.53 thorpej int
297 1.177 christos if_nulloutput(struct ifnet *ifp, struct mbuf *m,
298 1.181 dyoung const struct sockaddr *so, struct rtentry *rt)
299 1.53 thorpej {
300 1.53 thorpej
301 1.185 dyoung return ENXIO;
302 1.53 thorpej }
303 1.53 thorpej
304 1.53 thorpej void
305 1.177 christos if_nullinput(struct ifnet *ifp, struct mbuf *m)
306 1.53 thorpej {
307 1.53 thorpej
308 1.53 thorpej /* Nothing. */
309 1.53 thorpej }
310 1.53 thorpej
311 1.53 thorpej void
312 1.177 christos if_nullstart(struct ifnet *ifp)
313 1.53 thorpej {
314 1.53 thorpej
315 1.53 thorpej /* Nothing. */
316 1.53 thorpej }
317 1.53 thorpej
318 1.53 thorpej int
319 1.183 christos if_nullioctl(struct ifnet *ifp, u_long cmd, void *data)
320 1.53 thorpej {
321 1.53 thorpej
322 1.255 dyoung /* Wake ifioctl_detach(), who may wait for all threads to
323 1.255 dyoung * quit the critical section.
324 1.255 dyoung */
325 1.254 dyoung cv_signal(&ifp->if_ioctl_lock->il_emptied);
326 1.185 dyoung return ENXIO;
327 1.53 thorpej }
328 1.53 thorpej
329 1.53 thorpej int
330 1.177 christos if_nullinit(struct ifnet *ifp)
331 1.53 thorpej {
332 1.53 thorpej
333 1.185 dyoung return ENXIO;
334 1.53 thorpej }
335 1.53 thorpej
336 1.53 thorpej void
337 1.177 christos if_nullstop(struct ifnet *ifp, int disable)
338 1.75 thorpej {
339 1.75 thorpej
340 1.75 thorpej /* Nothing. */
341 1.75 thorpej }
342 1.75 thorpej
343 1.75 thorpej void
344 1.295 ozaki if_nullslowtimo(struct ifnet *ifp)
345 1.53 thorpej {
346 1.53 thorpej
347 1.53 thorpej /* Nothing. */
348 1.53 thorpej }
349 1.53 thorpej
350 1.53 thorpej void
351 1.177 christos if_nulldrain(struct ifnet *ifp)
352 1.53 thorpej {
353 1.53 thorpej
354 1.53 thorpej /* Nothing. */
355 1.53 thorpej }
356 1.53 thorpej
357 1.210 dyoung void
358 1.231 dyoung if_set_sadl(struct ifnet *ifp, const void *lla, u_char addrlen, bool factory)
359 1.210 dyoung {
360 1.210 dyoung struct ifaddr *ifa;
361 1.210 dyoung struct sockaddr_dl *sdl;
362 1.210 dyoung
363 1.210 dyoung ifp->if_addrlen = addrlen;
364 1.210 dyoung if_alloc_sadl(ifp);
365 1.210 dyoung ifa = ifp->if_dl;
366 1.210 dyoung sdl = satosdl(ifa->ifa_addr);
367 1.210 dyoung
368 1.210 dyoung (void)sockaddr_dl_setaddr(sdl, sdl->sdl_len, lla, ifp->if_addrlen);
369 1.231 dyoung if (factory) {
370 1.231 dyoung ifp->if_hwdl = ifp->if_dl;
371 1.291 rmind ifaref(ifp->if_hwdl);
372 1.231 dyoung }
373 1.223 dyoung /* TBD routing socket */
374 1.210 dyoung }
375 1.210 dyoung
376 1.211 dyoung struct ifaddr *
377 1.211 dyoung if_dl_create(const struct ifnet *ifp, const struct sockaddr_dl **sdlp)
378 1.211 dyoung {
379 1.211 dyoung unsigned socksize, ifasize;
380 1.211 dyoung int addrlen, namelen;
381 1.211 dyoung struct sockaddr_dl *mask, *sdl;
382 1.211 dyoung struct ifaddr *ifa;
383 1.211 dyoung
384 1.211 dyoung namelen = strlen(ifp->if_xname);
385 1.211 dyoung addrlen = ifp->if_addrlen;
386 1.211 dyoung socksize = roundup(sockaddr_dl_measure(namelen, addrlen), sizeof(long));
387 1.211 dyoung ifasize = sizeof(*ifa) + 2 * socksize;
388 1.211 dyoung ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK|M_ZERO);
389 1.211 dyoung
390 1.211 dyoung sdl = (struct sockaddr_dl *)(ifa + 1);
391 1.211 dyoung mask = (struct sockaddr_dl *)(socksize + (char *)sdl);
392 1.211 dyoung
393 1.211 dyoung sockaddr_dl_init(sdl, socksize, ifp->if_index, ifp->if_type,
394 1.211 dyoung ifp->if_xname, namelen, NULL, addrlen);
395 1.211 dyoung mask->sdl_len = sockaddr_dl_measure(namelen, 0);
396 1.211 dyoung memset(&mask->sdl_data[0], 0xff, namelen);
397 1.211 dyoung ifa->ifa_rtrequest = link_rtrequest;
398 1.211 dyoung ifa->ifa_addr = (struct sockaddr *)sdl;
399 1.211 dyoung ifa->ifa_netmask = (struct sockaddr *)mask;
400 1.211 dyoung
401 1.211 dyoung *sdlp = sdl;
402 1.211 dyoung
403 1.211 dyoung return ifa;
404 1.211 dyoung }
405 1.211 dyoung
406 1.223 dyoung static void
407 1.223 dyoung if_sadl_setrefs(struct ifnet *ifp, struct ifaddr *ifa)
408 1.223 dyoung {
409 1.223 dyoung const struct sockaddr_dl *sdl;
410 1.223 dyoung ifnet_addrs[ifp->if_index] = ifa;
411 1.291 rmind ifaref(ifa);
412 1.223 dyoung ifp->if_dl = ifa;
413 1.291 rmind ifaref(ifa);
414 1.223 dyoung sdl = satosdl(ifa->ifa_addr);
415 1.223 dyoung ifp->if_sadl = sdl;
416 1.223 dyoung }
417 1.223 dyoung
418 1.1 cgd /*
419 1.81 thorpej * Allocate the link level name for the specified interface. This
420 1.81 thorpej * is an attachment helper. It must be called after ifp->if_addrlen
421 1.81 thorpej * is initialized, which may not be the case when if_attach() is
422 1.81 thorpej * called.
423 1.81 thorpej */
424 1.81 thorpej void
425 1.81 thorpej if_alloc_sadl(struct ifnet *ifp)
426 1.81 thorpej {
427 1.81 thorpej struct ifaddr *ifa;
428 1.211 dyoung const struct sockaddr_dl *sdl;
429 1.84 thorpej
430 1.84 thorpej /*
431 1.84 thorpej * If the interface already has a link name, release it
432 1.84 thorpej * now. This is useful for interfaces that can change
433 1.84 thorpej * link types, and thus switch link names often.
434 1.84 thorpej */
435 1.84 thorpej if (ifp->if_sadl != NULL)
436 1.84 thorpej if_free_sadl(ifp);
437 1.81 thorpej
438 1.211 dyoung ifa = if_dl_create(ifp, &sdl);
439 1.195 dyoung
440 1.207 dyoung ifa_insert(ifp, ifa);
441 1.223 dyoung if_sadl_setrefs(ifp, ifa);
442 1.223 dyoung }
443 1.223 dyoung
444 1.223 dyoung static void
445 1.223 dyoung if_deactivate_sadl(struct ifnet *ifp)
446 1.223 dyoung {
447 1.223 dyoung struct ifaddr *ifa;
448 1.223 dyoung
449 1.223 dyoung KASSERT(ifp->if_dl != NULL);
450 1.223 dyoung
451 1.223 dyoung ifa = ifp->if_dl;
452 1.223 dyoung
453 1.223 dyoung ifp->if_sadl = NULL;
454 1.223 dyoung
455 1.223 dyoung ifnet_addrs[ifp->if_index] = NULL;
456 1.291 rmind ifafree(ifa);
457 1.223 dyoung ifp->if_dl = NULL;
458 1.291 rmind ifafree(ifa);
459 1.223 dyoung }
460 1.223 dyoung
461 1.224 dyoung void
462 1.223 dyoung if_activate_sadl(struct ifnet *ifp, struct ifaddr *ifa,
463 1.223 dyoung const struct sockaddr_dl *sdl)
464 1.223 dyoung {
465 1.223 dyoung int s;
466 1.223 dyoung
467 1.223 dyoung s = splnet();
468 1.223 dyoung
469 1.223 dyoung if_deactivate_sadl(ifp);
470 1.223 dyoung
471 1.223 dyoung if_sadl_setrefs(ifp, ifa);
472 1.231 dyoung IFADDR_FOREACH(ifa, ifp)
473 1.231 dyoung rtinit(ifa, RTM_LLINFO_UPD, 0);
474 1.223 dyoung splx(s);
475 1.81 thorpej }
476 1.81 thorpej
477 1.81 thorpej /*
478 1.81 thorpej * Free the link level name for the specified interface. This is
479 1.300 ozaki * a detach helper. This is called from if_detach().
480 1.81 thorpej */
481 1.300 ozaki static void
482 1.81 thorpej if_free_sadl(struct ifnet *ifp)
483 1.81 thorpej {
484 1.81 thorpej struct ifaddr *ifa;
485 1.81 thorpej int s;
486 1.81 thorpej
487 1.81 thorpej ifa = ifnet_addrs[ifp->if_index];
488 1.81 thorpej if (ifa == NULL) {
489 1.81 thorpej KASSERT(ifp->if_sadl == NULL);
490 1.209 dyoung KASSERT(ifp->if_dl == NULL);
491 1.81 thorpej return;
492 1.81 thorpej }
493 1.81 thorpej
494 1.81 thorpej KASSERT(ifp->if_sadl != NULL);
495 1.209 dyoung KASSERT(ifp->if_dl != NULL);
496 1.81 thorpej
497 1.88 thorpej s = splnet();
498 1.81 thorpej rtinit(ifa, RTM_DELETE, 0);
499 1.207 dyoung ifa_remove(ifp, ifa);
500 1.223 dyoung if_deactivate_sadl(ifp);
501 1.231 dyoung if (ifp->if_hwdl == ifa) {
502 1.291 rmind ifafree(ifa);
503 1.231 dyoung ifp->if_hwdl = NULL;
504 1.231 dyoung }
505 1.81 thorpej splx(s);
506 1.81 thorpej }
507 1.81 thorpej
508 1.274 rmind static void
509 1.274 rmind if_getindex(ifnet_t *ifp)
510 1.1 cgd {
511 1.274 rmind bool hitlimit = false;
512 1.231 dyoung
513 1.234 dyoung mutex_enter(&index_gen_mtx);
514 1.234 dyoung ifp->if_index_gen = index_gen++;
515 1.234 dyoung mutex_exit(&index_gen_mtx);
516 1.234 dyoung
517 1.102 atatat ifp->if_index = if_index;
518 1.274 rmind if (ifindex2ifnet == NULL) {
519 1.102 atatat if_index++;
520 1.274 rmind goto skip;
521 1.274 rmind }
522 1.274 rmind while (if_byindex(ifp->if_index)) {
523 1.274 rmind /*
524 1.274 rmind * If we hit USHRT_MAX, we skip back to 0 since
525 1.274 rmind * there are a number of places where the value
526 1.274 rmind * of if_index or if_index itself is compared
527 1.274 rmind * to or stored in an unsigned short. By
528 1.274 rmind * jumping back, we won't botch those assignments
529 1.274 rmind * or comparisons.
530 1.274 rmind */
531 1.274 rmind if (++if_index == 0) {
532 1.274 rmind if_index = 1;
533 1.274 rmind } else if (if_index == USHRT_MAX) {
534 1.102 atatat /*
535 1.274 rmind * However, if we have to jump back to
536 1.274 rmind * zero *twice* without finding an empty
537 1.274 rmind * slot in ifindex2ifnet[], then there
538 1.274 rmind * there are too many (>65535) interfaces.
539 1.102 atatat */
540 1.274 rmind if (hitlimit) {
541 1.274 rmind panic("too many interfaces");
542 1.102 atatat }
543 1.274 rmind hitlimit = true;
544 1.274 rmind if_index = 1;
545 1.102 atatat }
546 1.274 rmind ifp->if_index = if_index;
547 1.274 rmind }
548 1.274 rmind skip:
549 1.49 itojun /*
550 1.49 itojun * We have some arrays that should be indexed by if_index.
551 1.49 itojun * since if_index will grow dynamically, they should grow too.
552 1.49 itojun * struct ifadd **ifnet_addrs
553 1.49 itojun * struct ifnet **ifindex2ifnet
554 1.49 itojun */
555 1.185 dyoung if (ifnet_addrs == NULL || ifindex2ifnet == NULL ||
556 1.53 thorpej ifp->if_index >= if_indexlim) {
557 1.131 itojun size_t m, n, oldlim;
558 1.183 christos void *q;
559 1.154 perry
560 1.131 itojun oldlim = if_indexlim;
561 1.53 thorpej while (ifp->if_index >= if_indexlim)
562 1.49 itojun if_indexlim <<= 1;
563 1.49 itojun
564 1.49 itojun /* grow ifnet_addrs */
565 1.131 itojun m = oldlim * sizeof(struct ifaddr *);
566 1.81 thorpej n = if_indexlim * sizeof(struct ifaddr *);
567 1.230 dyoung q = malloc(n, M_IFADDR, M_WAITOK|M_ZERO);
568 1.185 dyoung if (ifnet_addrs != NULL) {
569 1.185 dyoung memcpy(q, ifnet_addrs, m);
570 1.230 dyoung free(ifnet_addrs, M_IFADDR);
571 1.1 cgd }
572 1.49 itojun ifnet_addrs = (struct ifaddr **)q;
573 1.49 itojun
574 1.49 itojun /* grow ifindex2ifnet */
575 1.131 itojun m = oldlim * sizeof(struct ifnet *);
576 1.49 itojun n = if_indexlim * sizeof(struct ifnet *);
577 1.230 dyoung q = malloc(n, M_IFADDR, M_WAITOK|M_ZERO);
578 1.185 dyoung if (ifindex2ifnet != NULL) {
579 1.230 dyoung memcpy(q, ifindex2ifnet, m);
580 1.230 dyoung free(ifindex2ifnet, M_IFADDR);
581 1.49 itojun }
582 1.49 itojun ifindex2ifnet = (struct ifnet **)q;
583 1.1 cgd }
584 1.274 rmind ifindex2ifnet[ifp->if_index] = ifp;
585 1.274 rmind }
586 1.274 rmind
587 1.274 rmind /*
588 1.307 ozaki * Initialize an interface and assign an index for it.
589 1.307 ozaki *
590 1.307 ozaki * It must be called prior to a device specific attach routine
591 1.307 ozaki * (e.g., ether_ifattach and ieee80211_ifattach) or if_alloc_sadl,
592 1.307 ozaki * and be followed by if_register:
593 1.307 ozaki *
594 1.307 ozaki * if_initialize(ifp);
595 1.307 ozaki * ether_ifattach(ifp, enaddr);
596 1.307 ozaki * if_register(ifp);
597 1.274 rmind */
598 1.274 rmind void
599 1.307 ozaki if_initialize(ifnet_t *ifp)
600 1.274 rmind {
601 1.274 rmind KASSERT(if_indexlim > 0);
602 1.274 rmind TAILQ_INIT(&ifp->if_addrlist);
603 1.49 itojun
604 1.1 cgd /*
605 1.81 thorpej * Link level name is allocated later by a separate call to
606 1.81 thorpej * if_alloc_sadl().
607 1.1 cgd */
608 1.81 thorpej
609 1.40 thorpej if (ifp->if_snd.ifq_maxlen == 0)
610 1.94 itojun ifp->if_snd.ifq_maxlen = ifqmaxlen;
611 1.234 dyoung
612 1.42 is ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */
613 1.57 thorpej
614 1.57 thorpej ifp->if_link_state = LINK_STATE_UNKNOWN;
615 1.57 thorpej
616 1.89 thorpej ifp->if_capenable = 0;
617 1.97 thorpej ifp->if_csum_flags_tx = 0;
618 1.97 thorpej ifp->if_csum_flags_rx = 0;
619 1.89 thorpej
620 1.86 thorpej #ifdef ALTQ
621 1.86 thorpej ifp->if_snd.altq_type = 0;
622 1.86 thorpej ifp->if_snd.altq_disc = NULL;
623 1.86 thorpej ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE;
624 1.86 thorpej ifp->if_snd.altq_tbr = NULL;
625 1.86 thorpej ifp->if_snd.altq_ifp = ifp;
626 1.86 thorpej #endif
627 1.86 thorpej
628 1.285 ozaki #ifdef NET_MPSAFE
629 1.285 ozaki ifp->if_snd.ifq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET);
630 1.285 ozaki #else
631 1.285 ozaki ifp->if_snd.ifq_lock = NULL;
632 1.285 ozaki #endif
633 1.285 ozaki
634 1.265 rmind ifp->if_pfil = pfil_head_create(PFIL_TYPE_IFNET, ifp);
635 1.265 rmind (void)pfil_run_hooks(if_pfil,
636 1.144 yamt (struct mbuf **)PFIL_IFNET_ATTACH, ifp, PFIL_IFNET);
637 1.87 thorpej
638 1.307 ozaki if_getindex(ifp);
639 1.307 ozaki }
640 1.307 ozaki
641 1.307 ozaki /*
642 1.307 ozaki * Register an interface to the list of "active" interfaces.
643 1.307 ozaki */
644 1.307 ozaki void
645 1.307 ozaki if_register(ifnet_t *ifp)
646 1.307 ozaki {
647 1.307 ozaki if (ifioctl_attach(ifp) != 0)
648 1.307 ozaki panic("%s: ifioctl_attach() failed", __func__);
649 1.307 ozaki
650 1.307 ozaki sysctl_sndq_setup(&ifp->if_sysctl_log, ifp->if_xname, &ifp->if_snd);
651 1.307 ozaki
652 1.152 matt if (!STAILQ_EMPTY(&domains))
653 1.147 tron if_attachdomain1(ifp);
654 1.147 tron
655 1.107 itojun /* Announce the interface. */
656 1.107 itojun rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
657 1.296 ozaki
658 1.296 ozaki if (ifp->if_slowtimo != NULL) {
659 1.297 ozaki ifp->if_slowtimo_ch =
660 1.297 ozaki kmem_zalloc(sizeof(*ifp->if_slowtimo_ch), KM_SLEEP);
661 1.297 ozaki callout_init(ifp->if_slowtimo_ch, 0);
662 1.297 ozaki callout_setfunc(ifp->if_slowtimo_ch, if_slowtimo, ifp);
663 1.296 ozaki if_slowtimo(ifp);
664 1.296 ozaki }
665 1.307 ozaki
666 1.307 ozaki TAILQ_INSERT_TAIL(&ifnet_list, ifp, if_list);
667 1.307 ozaki }
668 1.307 ozaki
669 1.307 ozaki /*
670 1.307 ozaki * Deprecated. Use if_initialize and if_register instead.
671 1.307 ozaki * See the above comment of if_initialize.
672 1.307 ozaki */
673 1.307 ozaki void
674 1.307 ozaki if_attach(ifnet_t *ifp)
675 1.307 ozaki {
676 1.307 ozaki if_initialize(ifp);
677 1.307 ozaki if_register(ifp);
678 1.107 itojun }
679 1.107 itojun
680 1.107 itojun void
681 1.163 thorpej if_attachdomain(void)
682 1.107 itojun {
683 1.107 itojun struct ifnet *ifp;
684 1.110 itojun int s;
685 1.107 itojun
686 1.110 itojun s = splnet();
687 1.185 dyoung IFNET_FOREACH(ifp)
688 1.107 itojun if_attachdomain1(ifp);
689 1.110 itojun splx(s);
690 1.107 itojun }
691 1.107 itojun
692 1.302 ozaki static void
693 1.163 thorpej if_attachdomain1(struct ifnet *ifp)
694 1.107 itojun {
695 1.107 itojun struct domain *dp;
696 1.109 itojun int s;
697 1.109 itojun
698 1.109 itojun s = splnet();
699 1.107 itojun
700 1.106 itojun /* address family dependent data region */
701 1.106 itojun memset(ifp->if_afdata, 0, sizeof(ifp->if_afdata));
702 1.152 matt DOMAIN_FOREACH(dp) {
703 1.185 dyoung if (dp->dom_ifattach != NULL)
704 1.106 itojun ifp->if_afdata[dp->dom_family] =
705 1.106 itojun (*dp->dom_ifattach)(ifp);
706 1.106 itojun }
707 1.109 itojun
708 1.109 itojun splx(s);
709 1.1 cgd }
710 1.53 thorpej
711 1.53 thorpej /*
712 1.53 thorpej * Deactivate an interface. This points all of the procedure
713 1.53 thorpej * handles at error stubs. May be called from interrupt context.
714 1.53 thorpej */
715 1.53 thorpej void
716 1.163 thorpej if_deactivate(struct ifnet *ifp)
717 1.53 thorpej {
718 1.53 thorpej int s;
719 1.53 thorpej
720 1.88 thorpej s = splnet();
721 1.53 thorpej
722 1.53 thorpej ifp->if_output = if_nulloutput;
723 1.53 thorpej ifp->if_input = if_nullinput;
724 1.53 thorpej ifp->if_start = if_nullstart;
725 1.53 thorpej ifp->if_ioctl = if_nullioctl;
726 1.75 thorpej ifp->if_init = if_nullinit;
727 1.75 thorpej ifp->if_stop = if_nullstop;
728 1.295 ozaki ifp->if_slowtimo = if_nullslowtimo;
729 1.53 thorpej ifp->if_drain = if_nulldrain;
730 1.53 thorpej
731 1.53 thorpej /* No more packets may be enqueued. */
732 1.53 thorpej ifp->if_snd.ifq_maxlen = 0;
733 1.53 thorpej
734 1.53 thorpej splx(s);
735 1.53 thorpej }
736 1.53 thorpej
737 1.206 dyoung void
738 1.218 dyoung if_purgeaddrs(struct ifnet *ifp, int family, void (*purgeaddr)(struct ifaddr *))
739 1.206 dyoung {
740 1.289 ozaki struct ifaddr *ifa, *nifa;
741 1.206 dyoung
742 1.289 ozaki IFADDR_FOREACH_SAFE(ifa, ifp, nifa) {
743 1.206 dyoung if (ifa->ifa_addr->sa_family != family)
744 1.206 dyoung continue;
745 1.206 dyoung (*purgeaddr)(ifa);
746 1.206 dyoung }
747 1.206 dyoung }
748 1.206 dyoung
749 1.53 thorpej /*
750 1.53 thorpej * Detach an interface from the list of "active" interfaces,
751 1.53 thorpej * freeing any resources as we go along.
752 1.53 thorpej *
753 1.53 thorpej * NOTE: This routine must be called with a valid thread context,
754 1.53 thorpej * as it may block.
755 1.53 thorpej */
756 1.53 thorpej void
757 1.163 thorpej if_detach(struct ifnet *ifp)
758 1.53 thorpej {
759 1.56 thorpej struct socket so;
760 1.178 dyoung struct ifaddr *ifa;
761 1.53 thorpej #ifdef IFAREF_DEBUG
762 1.53 thorpej struct ifaddr *last_ifa = NULL;
763 1.53 thorpej #endif
764 1.56 thorpej struct domain *dp;
765 1.141 matt const struct protosw *pr;
766 1.56 thorpej int s, i, family, purged;
767 1.276 rmind uint64_t xc;
768 1.53 thorpej
769 1.56 thorpej /*
770 1.56 thorpej * XXX It's kind of lame that we have to have the
771 1.56 thorpej * XXX socket structure...
772 1.56 thorpej */
773 1.56 thorpej memset(&so, 0, sizeof(so));
774 1.53 thorpej
775 1.88 thorpej s = splnet();
776 1.53 thorpej
777 1.296 ozaki if (ifp->if_slowtimo != NULL) {
778 1.305 martin ifp->if_slowtimo = NULL;
779 1.297 ozaki callout_halt(ifp->if_slowtimo_ch, NULL);
780 1.297 ozaki callout_destroy(ifp->if_slowtimo_ch);
781 1.297 ozaki kmem_free(ifp->if_slowtimo_ch, sizeof(*ifp->if_slowtimo_ch));
782 1.296 ozaki }
783 1.296 ozaki
784 1.53 thorpej /*
785 1.53 thorpej * Do an if_down() to give protocols a chance to do something.
786 1.53 thorpej */
787 1.53 thorpej if_down(ifp);
788 1.86 thorpej
789 1.86 thorpej #ifdef ALTQ
790 1.86 thorpej if (ALTQ_IS_ENABLED(&ifp->if_snd))
791 1.86 thorpej altq_disable(&ifp->if_snd);
792 1.86 thorpej if (ALTQ_IS_ATTACHED(&ifp->if_snd))
793 1.86 thorpej altq_detach(&ifp->if_snd);
794 1.87 thorpej #endif
795 1.87 thorpej
796 1.285 ozaki if (ifp->if_snd.ifq_lock)
797 1.285 ozaki mutex_obj_free(ifp->if_snd.ifq_lock);
798 1.285 ozaki
799 1.234 dyoung sysctl_teardown(&ifp->if_sysctl_log);
800 1.166 liamjfoy
801 1.166 liamjfoy #if NCARP > 0
802 1.166 liamjfoy /* Remove the interface from any carp group it is a part of. */
803 1.185 dyoung if (ifp->if_carp != NULL && ifp->if_type != IFT_CARP)
804 1.166 liamjfoy carp_ifdetach(ifp);
805 1.166 liamjfoy #endif
806 1.166 liamjfoy
807 1.53 thorpej /*
808 1.53 thorpej * Rip all the addresses off the interface. This should make
809 1.53 thorpej * all of the routes go away.
810 1.178 dyoung *
811 1.178 dyoung * pr_usrreq calls can remove an arbitrary number of ifaddrs
812 1.178 dyoung * from the list, including our "cursor", ifa. For safety,
813 1.178 dyoung * and to honor the TAILQ abstraction, I just restart the
814 1.178 dyoung * loop after each removal. Note that the loop will exit
815 1.178 dyoung * when all of the remaining ifaddrs belong to the AF_LINK
816 1.178 dyoung * family. I am counting on the historical fact that at
817 1.178 dyoung * least one pr_usrreq in each address domain removes at
818 1.178 dyoung * least one ifaddr.
819 1.53 thorpej */
820 1.178 dyoung again:
821 1.204 dyoung IFADDR_FOREACH(ifa, ifp) {
822 1.56 thorpej family = ifa->ifa_addr->sa_family;
823 1.53 thorpej #ifdef IFAREF_DEBUG
824 1.53 thorpej printf("if_detach: ifaddr %p, family %d, refcnt %d\n",
825 1.56 thorpej ifa, family, ifa->ifa_refcnt);
826 1.53 thorpej if (last_ifa != NULL && ifa == last_ifa)
827 1.56 thorpej panic("if_detach: loop detected");
828 1.53 thorpej last_ifa = ifa;
829 1.53 thorpej #endif
830 1.178 dyoung if (family == AF_LINK)
831 1.118 itojun continue;
832 1.118 itojun dp = pffinddomain(family);
833 1.56 thorpej #ifdef DIAGNOSTIC
834 1.118 itojun if (dp == NULL)
835 1.118 itojun panic("if_detach: no domain for AF %d",
836 1.118 itojun family);
837 1.56 thorpej #endif
838 1.160 gdt /*
839 1.160 gdt * XXX These PURGEIF calls are redundant with the
840 1.160 gdt * purge-all-families calls below, but are left in for
841 1.160 gdt * now both to make a smaller change, and to avoid
842 1.160 gdt * unplanned interactions with clearing of
843 1.160 gdt * ifp->if_addrlist.
844 1.160 gdt */
845 1.118 itojun purged = 0;
846 1.118 itojun for (pr = dp->dom_protosw;
847 1.118 itojun pr < dp->dom_protoswNPROTOSW; pr++) {
848 1.118 itojun so.so_proto = pr;
849 1.275 rmind if (pr->pr_usrreqs) {
850 1.290 rtr (void) (*pr->pr_usrreqs->pr_purgeif)(&so, ifp);
851 1.118 itojun purged = 1;
852 1.53 thorpej }
853 1.118 itojun }
854 1.118 itojun if (purged == 0) {
855 1.118 itojun /*
856 1.118 itojun * XXX What's really the best thing to do
857 1.135 keihan * XXX here? --thorpej (at) NetBSD.org
858 1.118 itojun */
859 1.118 itojun printf("if_detach: WARNING: AF %d not purged\n",
860 1.118 itojun family);
861 1.207 dyoung ifa_remove(ifp, ifa);
862 1.53 thorpej }
863 1.178 dyoung goto again;
864 1.53 thorpej }
865 1.118 itojun
866 1.118 itojun if_free_sadl(ifp);
867 1.53 thorpej
868 1.180 dyoung /* Walk the routing table looking for stragglers. */
869 1.243 dyoung for (i = 0; i <= AF_MAX; i++) {
870 1.243 dyoung while (rt_walktree(i, if_rt_walktree, ifp) == ERESTART)
871 1.260 christos continue;
872 1.243 dyoung }
873 1.106 itojun
874 1.152 matt DOMAIN_FOREACH(dp) {
875 1.185 dyoung if (dp->dom_ifdetach != NULL && ifp->if_afdata[dp->dom_family])
876 1.260 christos {
877 1.260 christos void *p = ifp->if_afdata[dp->dom_family];
878 1.260 christos if (p) {
879 1.260 christos ifp->if_afdata[dp->dom_family] = NULL;
880 1.260 christos (*dp->dom_ifdetach)(ifp, p);
881 1.260 christos }
882 1.260 christos }
883 1.160 gdt
884 1.160 gdt /*
885 1.160 gdt * One would expect multicast memberships (INET and
886 1.160 gdt * INET6) on UDP sockets to be purged by the PURGEIF
887 1.160 gdt * calls above, but if all addresses were removed from
888 1.160 gdt * the interface prior to destruction, the calls will
889 1.160 gdt * not be made (e.g. ppp, for which pppd(8) generally
890 1.160 gdt * removes addresses before destroying the interface).
891 1.160 gdt * Because there is no invariant that multicast
892 1.160 gdt * memberships only exist for interfaces with IPv4
893 1.160 gdt * addresses, we must call PURGEIF regardless of
894 1.160 gdt * addresses. (Protocols which might store ifnet
895 1.160 gdt * pointers are marked with PR_PURGEIF.)
896 1.160 gdt */
897 1.185 dyoung for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
898 1.160 gdt so.so_proto = pr;
899 1.275 rmind if (pr->pr_usrreqs && pr->pr_flags & PR_PURGEIF)
900 1.290 rtr (void)(*pr->pr_usrreqs->pr_purgeif)(&so, ifp);
901 1.160 gdt }
902 1.53 thorpej }
903 1.57 thorpej
904 1.265 rmind (void)pfil_run_hooks(if_pfil,
905 1.184 dyoung (struct mbuf **)PFIL_IFNET_DETACH, ifp, PFIL_IFNET);
906 1.265 rmind (void)pfil_head_destroy(ifp->if_pfil);
907 1.184 dyoung
908 1.57 thorpej /* Announce that the interface is gone. */
909 1.57 thorpej rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
910 1.93 itojun
911 1.93 itojun ifindex2ifnet[ifp->if_index] = NULL;
912 1.53 thorpej
913 1.274 rmind TAILQ_REMOVE(&ifnet_list, ifp, if_list);
914 1.53 thorpej
915 1.252 dyoung ifioctl_detach(ifp);
916 1.252 dyoung
917 1.95 itojun /*
918 1.168 matt * remove packets that came from ifp, from software interrupt queues.
919 1.95 itojun */
920 1.168 matt DOMAIN_FOREACH(dp) {
921 1.168 matt for (i = 0; i < __arraycount(dp->dom_ifqueues); i++) {
922 1.260 christos struct ifqueue *iq = dp->dom_ifqueues[i];
923 1.260 christos if (iq == NULL)
924 1.168 matt break;
925 1.260 christos dp->dom_ifqueues[i] = NULL;
926 1.260 christos if_detach_queues(ifp, iq);
927 1.168 matt }
928 1.168 matt }
929 1.95 itojun
930 1.276 rmind /*
931 1.276 rmind * IP queues have to be processed separately: net-queue barrier
932 1.276 rmind * ensures that the packets are dequeued while a cross-call will
933 1.276 rmind * ensure that the interrupts have completed. FIXME: not quite..
934 1.276 rmind */
935 1.278 he #ifdef INET
936 1.276 rmind pktq_barrier(ip_pktq);
937 1.278 he #endif
938 1.281 rmind #ifdef INET6
939 1.293 pooka if (in6_present)
940 1.293 pooka pktq_barrier(ip6_pktq);
941 1.281 rmind #endif
942 1.276 rmind xc = xc_broadcast(0, (xcfunc_t)nullop, NULL, NULL);
943 1.276 rmind xc_wait(xc);
944 1.276 rmind
945 1.53 thorpej splx(s);
946 1.95 itojun }
947 1.95 itojun
948 1.95 itojun static void
949 1.163 thorpej if_detach_queues(struct ifnet *ifp, struct ifqueue *q)
950 1.95 itojun {
951 1.95 itojun struct mbuf *m, *prev, *next;
952 1.95 itojun
953 1.95 itojun prev = NULL;
954 1.185 dyoung for (m = q->ifq_head; m != NULL; m = next) {
955 1.274 rmind KASSERT((m->m_flags & M_PKTHDR) != 0);
956 1.274 rmind
957 1.95 itojun next = m->m_nextpkt;
958 1.96 itojun if (m->m_pkthdr.rcvif != ifp) {
959 1.96 itojun prev = m;
960 1.95 itojun continue;
961 1.96 itojun }
962 1.95 itojun
963 1.185 dyoung if (prev != NULL)
964 1.95 itojun prev->m_nextpkt = m->m_nextpkt;
965 1.95 itojun else
966 1.95 itojun q->ifq_head = m->m_nextpkt;
967 1.95 itojun if (q->ifq_tail == m)
968 1.95 itojun q->ifq_tail = prev;
969 1.95 itojun q->ifq_len--;
970 1.95 itojun
971 1.95 itojun m->m_nextpkt = NULL;
972 1.95 itojun m_freem(m);
973 1.95 itojun IF_DROP(q);
974 1.95 itojun }
975 1.53 thorpej }
976 1.53 thorpej
977 1.53 thorpej /*
978 1.53 thorpej * Callback for a radix tree walk to delete all references to an
979 1.53 thorpej * ifnet.
980 1.53 thorpej */
981 1.163 thorpej static int
982 1.192 dyoung if_rt_walktree(struct rtentry *rt, void *v)
983 1.53 thorpej {
984 1.55 itojun struct ifnet *ifp = (struct ifnet *)v;
985 1.53 thorpej int error;
986 1.53 thorpej
987 1.185 dyoung if (rt->rt_ifp != ifp)
988 1.185 dyoung return 0;
989 1.185 dyoung
990 1.185 dyoung /* Delete the entry. */
991 1.185 dyoung ++rt->rt_refcnt;
992 1.194 dyoung error = rtrequest(RTM_DELETE, rt_getkey(rt), rt->rt_gateway,
993 1.185 dyoung rt_mask(rt), rt->rt_flags, NULL);
994 1.185 dyoung KASSERT((rt->rt_flags & RTF_UP) == 0);
995 1.185 dyoung rt->rt_ifp = NULL;
996 1.277 rmind rtfree(rt);
997 1.185 dyoung if (error != 0)
998 1.185 dyoung printf("%s: warning: unable to delete rtentry @ %p, "
999 1.185 dyoung "error = %d\n", ifp->if_xname, rt, error);
1000 1.243 dyoung return ERESTART;
1001 1.53 thorpej }
1002 1.53 thorpej
1003 1.1 cgd /*
1004 1.63 thorpej * Create a clone network interface.
1005 1.63 thorpej */
1006 1.302 ozaki static int
1007 1.163 thorpej if_clone_create(const char *name)
1008 1.63 thorpej {
1009 1.63 thorpej struct if_clone *ifc;
1010 1.63 thorpej int unit;
1011 1.63 thorpej
1012 1.63 thorpej ifc = if_clone_lookup(name, &unit);
1013 1.63 thorpej if (ifc == NULL)
1014 1.185 dyoung return EINVAL;
1015 1.63 thorpej
1016 1.63 thorpej if (ifunit(name) != NULL)
1017 1.185 dyoung return EEXIST;
1018 1.63 thorpej
1019 1.185 dyoung return (*ifc->ifc_create)(ifc, unit);
1020 1.63 thorpej }
1021 1.63 thorpej
1022 1.63 thorpej /*
1023 1.63 thorpej * Destroy a clone network interface.
1024 1.63 thorpej */
1025 1.302 ozaki static int
1026 1.163 thorpej if_clone_destroy(const char *name)
1027 1.63 thorpej {
1028 1.63 thorpej struct if_clone *ifc;
1029 1.63 thorpej struct ifnet *ifp;
1030 1.63 thorpej
1031 1.63 thorpej ifc = if_clone_lookup(name, NULL);
1032 1.63 thorpej if (ifc == NULL)
1033 1.185 dyoung return EINVAL;
1034 1.63 thorpej
1035 1.63 thorpej ifp = ifunit(name);
1036 1.63 thorpej if (ifp == NULL)
1037 1.185 dyoung return ENXIO;
1038 1.63 thorpej
1039 1.63 thorpej if (ifc->ifc_destroy == NULL)
1040 1.185 dyoung return EOPNOTSUPP;
1041 1.63 thorpej
1042 1.185 dyoung return (*ifc->ifc_destroy)(ifp);
1043 1.63 thorpej }
1044 1.63 thorpej
1045 1.63 thorpej /*
1046 1.63 thorpej * Look up a network interface cloner.
1047 1.63 thorpej */
1048 1.163 thorpej static struct if_clone *
1049 1.163 thorpej if_clone_lookup(const char *name, int *unitp)
1050 1.63 thorpej {
1051 1.63 thorpej struct if_clone *ifc;
1052 1.63 thorpej const char *cp;
1053 1.262 christos char *dp, ifname[IFNAMSIZ + 3];
1054 1.128 itojun int unit;
1055 1.63 thorpej
1056 1.262 christos strcpy(ifname, "if_");
1057 1.128 itojun /* separate interface name from unit */
1058 1.262 christos for (dp = ifname + 3, cp = name; cp - name < IFNAMSIZ &&
1059 1.262 christos *cp && (*cp < '0' || *cp > '9');)
1060 1.262 christos *dp++ = *cp++;
1061 1.128 itojun
1062 1.128 itojun if (cp == name || cp - name == IFNAMSIZ || !*cp)
1063 1.185 dyoung return NULL; /* No name or unit number */
1064 1.262 christos *dp++ = '\0';
1065 1.128 itojun
1066 1.262 christos again:
1067 1.128 itojun LIST_FOREACH(ifc, &if_cloners, ifc_list) {
1068 1.262 christos if (strcmp(ifname + 3, ifc->ifc_name) == 0)
1069 1.128 itojun break;
1070 1.63 thorpej }
1071 1.63 thorpej
1072 1.262 christos if (ifc == NULL) {
1073 1.262 christos if (*ifname == '\0' ||
1074 1.267 christos module_autoload(ifname, MODULE_CLASS_DRIVER))
1075 1.262 christos return NULL;
1076 1.262 christos *ifname = '\0';
1077 1.262 christos goto again;
1078 1.262 christos }
1079 1.63 thorpej
1080 1.128 itojun unit = 0;
1081 1.129 itojun while (cp - name < IFNAMSIZ && *cp) {
1082 1.245 christos if (*cp < '0' || *cp > '9' || unit >= INT_MAX / 10) {
1083 1.63 thorpej /* Bogus unit number. */
1084 1.185 dyoung return NULL;
1085 1.63 thorpej }
1086 1.128 itojun unit = (unit * 10) + (*cp++ - '0');
1087 1.63 thorpej }
1088 1.63 thorpej
1089 1.63 thorpej if (unitp != NULL)
1090 1.128 itojun *unitp = unit;
1091 1.185 dyoung return ifc;
1092 1.63 thorpej }
1093 1.63 thorpej
1094 1.63 thorpej /*
1095 1.63 thorpej * Register a network interface cloner.
1096 1.63 thorpej */
1097 1.63 thorpej void
1098 1.163 thorpej if_clone_attach(struct if_clone *ifc)
1099 1.63 thorpej {
1100 1.63 thorpej
1101 1.63 thorpej LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list);
1102 1.67 thorpej if_cloners_count++;
1103 1.63 thorpej }
1104 1.63 thorpej
1105 1.63 thorpej /*
1106 1.63 thorpej * Unregister a network interface cloner.
1107 1.63 thorpej */
1108 1.63 thorpej void
1109 1.163 thorpej if_clone_detach(struct if_clone *ifc)
1110 1.63 thorpej {
1111 1.63 thorpej
1112 1.63 thorpej LIST_REMOVE(ifc, ifc_list);
1113 1.67 thorpej if_cloners_count--;
1114 1.67 thorpej }
1115 1.67 thorpej
1116 1.67 thorpej /*
1117 1.67 thorpej * Provide list of interface cloners to userspace.
1118 1.67 thorpej */
1119 1.163 thorpej static int
1120 1.163 thorpej if_clone_list(struct if_clonereq *ifcr)
1121 1.67 thorpej {
1122 1.67 thorpej char outbuf[IFNAMSIZ], *dst;
1123 1.67 thorpej struct if_clone *ifc;
1124 1.67 thorpej int count, error = 0;
1125 1.67 thorpej
1126 1.67 thorpej ifcr->ifcr_total = if_cloners_count;
1127 1.67 thorpej if ((dst = ifcr->ifcr_buffer) == NULL) {
1128 1.67 thorpej /* Just asking how many there are. */
1129 1.185 dyoung return 0;
1130 1.67 thorpej }
1131 1.67 thorpej
1132 1.67 thorpej if (ifcr->ifcr_count < 0)
1133 1.185 dyoung return EINVAL;
1134 1.67 thorpej
1135 1.67 thorpej count = (if_cloners_count < ifcr->ifcr_count) ?
1136 1.67 thorpej if_cloners_count : ifcr->ifcr_count;
1137 1.67 thorpej
1138 1.67 thorpej for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0;
1139 1.67 thorpej ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) {
1140 1.175 christos (void)strncpy(outbuf, ifc->ifc_name, sizeof(outbuf));
1141 1.175 christos if (outbuf[sizeof(outbuf) - 1] != '\0')
1142 1.175 christos return ENAMETOOLONG;
1143 1.172 christos error = copyout(outbuf, dst, sizeof(outbuf));
1144 1.185 dyoung if (error != 0)
1145 1.67 thorpej break;
1146 1.67 thorpej }
1147 1.67 thorpej
1148 1.185 dyoung return error;
1149 1.63 thorpej }
1150 1.63 thorpej
1151 1.207 dyoung void
1152 1.291 rmind ifaref(struct ifaddr *ifa)
1153 1.291 rmind {
1154 1.291 rmind ifa->ifa_refcnt++;
1155 1.291 rmind }
1156 1.291 rmind
1157 1.291 rmind void
1158 1.291 rmind ifafree(struct ifaddr *ifa)
1159 1.291 rmind {
1160 1.291 rmind KASSERT(ifa != NULL);
1161 1.291 rmind KASSERT(ifa->ifa_refcnt > 0);
1162 1.291 rmind
1163 1.291 rmind if (--ifa->ifa_refcnt == 0) {
1164 1.291 rmind free(ifa, M_IFADDR);
1165 1.291 rmind }
1166 1.291 rmind }
1167 1.291 rmind
1168 1.291 rmind void
1169 1.207 dyoung ifa_insert(struct ifnet *ifp, struct ifaddr *ifa)
1170 1.207 dyoung {
1171 1.207 dyoung ifa->ifa_ifp = ifp;
1172 1.208 dyoung TAILQ_INSERT_TAIL(&ifp->if_addrlist, ifa, ifa_list);
1173 1.291 rmind ifaref(ifa);
1174 1.207 dyoung }
1175 1.207 dyoung
1176 1.207 dyoung void
1177 1.207 dyoung ifa_remove(struct ifnet *ifp, struct ifaddr *ifa)
1178 1.207 dyoung {
1179 1.207 dyoung KASSERT(ifa->ifa_ifp == ifp);
1180 1.207 dyoung TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list);
1181 1.291 rmind ifafree(ifa);
1182 1.207 dyoung }
1183 1.207 dyoung
1184 1.194 dyoung static inline int
1185 1.194 dyoung equal(const struct sockaddr *sa1, const struct sockaddr *sa2)
1186 1.194 dyoung {
1187 1.194 dyoung return sockaddr_cmp(sa1, sa2) == 0;
1188 1.194 dyoung }
1189 1.194 dyoung
1190 1.63 thorpej /*
1191 1.1 cgd * Locate an interface based on a complete address.
1192 1.1 cgd */
1193 1.1 cgd /*ARGSUSED*/
1194 1.1 cgd struct ifaddr *
1195 1.163 thorpej ifa_ifwithaddr(const struct sockaddr *addr)
1196 1.1 cgd {
1197 1.61 augustss struct ifnet *ifp;
1198 1.61 augustss struct ifaddr *ifa;
1199 1.1 cgd
1200 1.185 dyoung IFNET_FOREACH(ifp) {
1201 1.53 thorpej if (ifp->if_output == if_nulloutput)
1202 1.1 cgd continue;
1203 1.204 dyoung IFADDR_FOREACH(ifa, ifp) {
1204 1.53 thorpej if (ifa->ifa_addr->sa_family != addr->sa_family)
1205 1.53 thorpej continue;
1206 1.53 thorpej if (equal(addr, ifa->ifa_addr))
1207 1.185 dyoung return ifa;
1208 1.53 thorpej if ((ifp->if_flags & IFF_BROADCAST) &&
1209 1.53 thorpej ifa->ifa_broadaddr &&
1210 1.53 thorpej /* IP6 doesn't have broadcast */
1211 1.53 thorpej ifa->ifa_broadaddr->sa_len != 0 &&
1212 1.53 thorpej equal(ifa->ifa_broadaddr, addr))
1213 1.185 dyoung return ifa;
1214 1.53 thorpej }
1215 1.1 cgd }
1216 1.185 dyoung return NULL;
1217 1.1 cgd }
1218 1.49 itojun
1219 1.1 cgd /*
1220 1.1 cgd * Locate the point to point interface with a given destination address.
1221 1.1 cgd */
1222 1.1 cgd /*ARGSUSED*/
1223 1.1 cgd struct ifaddr *
1224 1.163 thorpej ifa_ifwithdstaddr(const struct sockaddr *addr)
1225 1.1 cgd {
1226 1.61 augustss struct ifnet *ifp;
1227 1.61 augustss struct ifaddr *ifa;
1228 1.1 cgd
1229 1.185 dyoung IFNET_FOREACH(ifp) {
1230 1.53 thorpej if (ifp->if_output == if_nulloutput)
1231 1.53 thorpej continue;
1232 1.185 dyoung if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1233 1.185 dyoung continue;
1234 1.204 dyoung IFADDR_FOREACH(ifa, ifp) {
1235 1.185 dyoung if (ifa->ifa_addr->sa_family != addr->sa_family ||
1236 1.185 dyoung ifa->ifa_dstaddr == NULL)
1237 1.185 dyoung continue;
1238 1.185 dyoung if (equal(addr, ifa->ifa_dstaddr))
1239 1.185 dyoung return ifa;
1240 1.53 thorpej }
1241 1.1 cgd }
1242 1.185 dyoung return NULL;
1243 1.1 cgd }
1244 1.1 cgd
1245 1.1 cgd /*
1246 1.1 cgd * Find an interface on a specific network. If many, choice
1247 1.15 mycroft * is most specific found.
1248 1.1 cgd */
1249 1.1 cgd struct ifaddr *
1250 1.163 thorpej ifa_ifwithnet(const struct sockaddr *addr)
1251 1.1 cgd {
1252 1.61 augustss struct ifnet *ifp;
1253 1.61 augustss struct ifaddr *ifa;
1254 1.140 matt const struct sockaddr_dl *sdl;
1255 1.15 mycroft struct ifaddr *ifa_maybe = 0;
1256 1.1 cgd u_int af = addr->sa_family;
1257 1.171 pooka const char *addr_data = addr->sa_data, *cplim;
1258 1.1 cgd
1259 1.1 cgd if (af == AF_LINK) {
1260 1.195 dyoung sdl = satocsdl(addr);
1261 1.137 itojun if (sdl->sdl_index && sdl->sdl_index < if_indexlim &&
1262 1.137 itojun ifindex2ifnet[sdl->sdl_index] &&
1263 1.53 thorpej ifindex2ifnet[sdl->sdl_index]->if_output != if_nulloutput)
1264 1.185 dyoung return ifnet_addrs[sdl->sdl_index];
1265 1.1 cgd }
1266 1.51 bouyer #ifdef NETATALK
1267 1.51 bouyer if (af == AF_APPLETALK) {
1268 1.140 matt const struct sockaddr_at *sat, *sat2;
1269 1.158 christos sat = (const struct sockaddr_at *)addr;
1270 1.185 dyoung IFNET_FOREACH(ifp) {
1271 1.53 thorpej if (ifp->if_output == if_nulloutput)
1272 1.53 thorpej continue;
1273 1.158 christos ifa = at_ifawithnet((const struct sockaddr_at *)addr, ifp);
1274 1.62 bouyer if (ifa == NULL)
1275 1.62 bouyer continue;
1276 1.62 bouyer sat2 = (struct sockaddr_at *)ifa->ifa_addr;
1277 1.62 bouyer if (sat2->sat_addr.s_net == sat->sat_addr.s_net)
1278 1.185 dyoung return ifa; /* exact match */
1279 1.62 bouyer if (ifa_maybe == NULL) {
1280 1.112 wiz /* else keep the if with the right range */
1281 1.62 bouyer ifa_maybe = ifa;
1282 1.62 bouyer }
1283 1.51 bouyer }
1284 1.185 dyoung return ifa_maybe;
1285 1.51 bouyer }
1286 1.51 bouyer #endif
1287 1.185 dyoung IFNET_FOREACH(ifp) {
1288 1.53 thorpej if (ifp->if_output == if_nulloutput)
1289 1.53 thorpej continue;
1290 1.204 dyoung IFADDR_FOREACH(ifa, ifp) {
1291 1.171 pooka const char *cp, *cp2, *cp3;
1292 1.15 mycroft
1293 1.15 mycroft if (ifa->ifa_addr->sa_family != af ||
1294 1.185 dyoung ifa->ifa_netmask == NULL)
1295 1.53 thorpej next: continue;
1296 1.15 mycroft cp = addr_data;
1297 1.15 mycroft cp2 = ifa->ifa_addr->sa_data;
1298 1.15 mycroft cp3 = ifa->ifa_netmask->sa_data;
1299 1.171 pooka cplim = (const char *)ifa->ifa_netmask +
1300 1.53 thorpej ifa->ifa_netmask->sa_len;
1301 1.53 thorpej while (cp3 < cplim) {
1302 1.53 thorpej if ((*cp++ ^ *cp2++) & *cp3++) {
1303 1.53 thorpej /* want to continue for() loop */
1304 1.32 mrg goto next;
1305 1.53 thorpej }
1306 1.53 thorpej }
1307 1.185 dyoung if (ifa_maybe == NULL ||
1308 1.183 christos rn_refines((void *)ifa->ifa_netmask,
1309 1.183 christos (void *)ifa_maybe->ifa_netmask))
1310 1.15 mycroft ifa_maybe = ifa;
1311 1.15 mycroft }
1312 1.53 thorpej }
1313 1.185 dyoung return ifa_maybe;
1314 1.26 mrg }
1315 1.53 thorpej
1316 1.26 mrg /*
1317 1.26 mrg * Find the interface of the addresss.
1318 1.26 mrg */
1319 1.26 mrg struct ifaddr *
1320 1.163 thorpej ifa_ifwithladdr(const struct sockaddr *addr)
1321 1.26 mrg {
1322 1.26 mrg struct ifaddr *ia;
1323 1.26 mrg
1324 1.53 thorpej if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) ||
1325 1.53 thorpej (ia = ifa_ifwithnet(addr)))
1326 1.185 dyoung return ia;
1327 1.185 dyoung return NULL;
1328 1.1 cgd }
1329 1.1 cgd
1330 1.1 cgd /*
1331 1.1 cgd * Find an interface using a specific address family
1332 1.1 cgd */
1333 1.1 cgd struct ifaddr *
1334 1.163 thorpej ifa_ifwithaf(int af)
1335 1.1 cgd {
1336 1.61 augustss struct ifnet *ifp;
1337 1.61 augustss struct ifaddr *ifa;
1338 1.1 cgd
1339 1.185 dyoung IFNET_FOREACH(ifp) {
1340 1.53 thorpej if (ifp->if_output == if_nulloutput)
1341 1.53 thorpej continue;
1342 1.204 dyoung IFADDR_FOREACH(ifa, ifp) {
1343 1.21 mycroft if (ifa->ifa_addr->sa_family == af)
1344 1.178 dyoung return ifa;
1345 1.53 thorpej }
1346 1.53 thorpej }
1347 1.178 dyoung return NULL;
1348 1.1 cgd }
1349 1.1 cgd
1350 1.1 cgd /*
1351 1.1 cgd * Find an interface address specific to an interface best matching
1352 1.1 cgd * a given address.
1353 1.1 cgd */
1354 1.1 cgd struct ifaddr *
1355 1.163 thorpej ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
1356 1.1 cgd {
1357 1.61 augustss struct ifaddr *ifa;
1358 1.140 matt const char *cp, *cp2, *cp3;
1359 1.140 matt const char *cplim;
1360 1.1 cgd struct ifaddr *ifa_maybe = 0;
1361 1.1 cgd u_int af = addr->sa_family;
1362 1.1 cgd
1363 1.53 thorpej if (ifp->if_output == if_nulloutput)
1364 1.185 dyoung return NULL;
1365 1.53 thorpej
1366 1.1 cgd if (af >= AF_MAX)
1367 1.185 dyoung return NULL;
1368 1.53 thorpej
1369 1.204 dyoung IFADDR_FOREACH(ifa, ifp) {
1370 1.1 cgd if (ifa->ifa_addr->sa_family != af)
1371 1.1 cgd continue;
1372 1.1 cgd ifa_maybe = ifa;
1373 1.185 dyoung if (ifa->ifa_netmask == NULL) {
1374 1.1 cgd if (equal(addr, ifa->ifa_addr) ||
1375 1.53 thorpej (ifa->ifa_dstaddr &&
1376 1.53 thorpej equal(addr, ifa->ifa_dstaddr)))
1377 1.185 dyoung return ifa;
1378 1.1 cgd continue;
1379 1.1 cgd }
1380 1.1 cgd cp = addr->sa_data;
1381 1.1 cgd cp2 = ifa->ifa_addr->sa_data;
1382 1.1 cgd cp3 = ifa->ifa_netmask->sa_data;
1383 1.1 cgd cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
1384 1.53 thorpej for (; cp3 < cplim; cp3++) {
1385 1.1 cgd if ((*cp++ ^ *cp2++) & *cp3)
1386 1.1 cgd break;
1387 1.53 thorpej }
1388 1.1 cgd if (cp3 == cplim)
1389 1.185 dyoung return ifa;
1390 1.1 cgd }
1391 1.185 dyoung return ifa_maybe;
1392 1.1 cgd }
1393 1.9 mycroft
1394 1.1 cgd /*
1395 1.1 cgd * Default action when installing a route with a Link Level gateway.
1396 1.1 cgd * Lookup an appropriate real ifa to point to.
1397 1.1 cgd * This should be moved to /sys/net/link.c eventually.
1398 1.1 cgd */
1399 1.15 mycroft void
1400 1.228 dyoung link_rtrequest(int cmd, struct rtentry *rt, const struct rt_addrinfo *info)
1401 1.1 cgd {
1402 1.61 augustss struct ifaddr *ifa;
1403 1.194 dyoung const struct sockaddr *dst;
1404 1.15 mycroft struct ifnet *ifp;
1405 1.1 cgd
1406 1.225 dyoung if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL ||
1407 1.225 dyoung (ifp = ifa->ifa_ifp) == NULL || (dst = rt_getkey(rt)) == NULL)
1408 1.1 cgd return;
1409 1.24 christos if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) {
1410 1.176 dyoung rt_replace_ifa(rt, ifa);
1411 1.1 cgd if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
1412 1.82 itojun ifa->ifa_rtrequest(cmd, rt, info);
1413 1.1 cgd }
1414 1.1 cgd }
1415 1.1 cgd
1416 1.1 cgd /*
1417 1.159 dyoung * Handle a change in the interface link state.
1418 1.264 roy * XXX: We should listen to the routing socket in-kernel rather
1419 1.264 roy * than calling in6_if_link_* functions directly from here.
1420 1.159 dyoung */
1421 1.159 dyoung void
1422 1.159 dyoung if_link_state_change(struct ifnet *ifp, int link_state)
1423 1.159 dyoung {
1424 1.268 martin int s;
1425 1.269 mrg #if defined(DEBUG) || defined(INET6)
1426 1.268 martin int old_link_state;
1427 1.268 martin #endif
1428 1.263 roy
1429 1.264 roy s = splnet();
1430 1.264 roy if (ifp->if_link_state == link_state) {
1431 1.264 roy splx(s);
1432 1.185 dyoung return;
1433 1.264 roy }
1434 1.263 roy
1435 1.269 mrg #if defined(DEBUG) || defined(INET6)
1436 1.263 roy old_link_state = ifp->if_link_state;
1437 1.268 martin #endif
1438 1.185 dyoung ifp->if_link_state = link_state;
1439 1.263 roy #ifdef DEBUG
1440 1.263 roy log(LOG_DEBUG, "%s: link state %s (was %s)\n", ifp->if_xname,
1441 1.263 roy link_state == LINK_STATE_UP ? "UP" :
1442 1.263 roy link_state == LINK_STATE_DOWN ? "DOWN" :
1443 1.263 roy "UNKNOWN",
1444 1.264 roy old_link_state == LINK_STATE_UP ? "UP" :
1445 1.263 roy old_link_state == LINK_STATE_DOWN ? "DOWN" :
1446 1.263 roy "UNKNOWN");
1447 1.263 roy #endif
1448 1.263 roy
1449 1.263 roy #ifdef INET6
1450 1.263 roy /*
1451 1.263 roy * When going from UNKNOWN to UP, we need to mark existing
1452 1.263 roy * IPv6 addresses as tentative and restart DAD as we may have
1453 1.263 roy * erroneously not found a duplicate.
1454 1.263 roy *
1455 1.263 roy * This needs to happen before rt_ifmsg to avoid a race where
1456 1.263 roy * listeners would have an address and expect it to work right
1457 1.263 roy * away.
1458 1.263 roy */
1459 1.270 pooka if (in6_present && link_state == LINK_STATE_UP &&
1460 1.263 roy old_link_state == LINK_STATE_UNKNOWN)
1461 1.264 roy in6_if_link_down(ifp);
1462 1.263 roy #endif
1463 1.263 roy
1464 1.159 dyoung /* Notify that the link state has changed. */
1465 1.185 dyoung rt_ifmsg(ifp);
1466 1.263 roy
1467 1.166 liamjfoy #if NCARP > 0
1468 1.185 dyoung if (ifp->if_carp)
1469 1.185 dyoung carp_carpdev_state(ifp);
1470 1.166 liamjfoy #endif
1471 1.263 roy
1472 1.263 roy #ifdef INET6
1473 1.270 pooka if (in6_present) {
1474 1.270 pooka if (link_state == LINK_STATE_DOWN)
1475 1.270 pooka in6_if_link_down(ifp);
1476 1.270 pooka else if (link_state == LINK_STATE_UP)
1477 1.270 pooka in6_if_link_up(ifp);
1478 1.270 pooka }
1479 1.263 roy #endif
1480 1.264 roy
1481 1.264 roy splx(s);
1482 1.159 dyoung }
1483 1.159 dyoung
1484 1.159 dyoung /*
1485 1.1 cgd * Mark an interface down and notify protocols of
1486 1.1 cgd * the transition.
1487 1.23 mycroft * NOTE: must be called at splsoftnet or equivalent.
1488 1.1 cgd */
1489 1.15 mycroft void
1490 1.163 thorpej if_down(struct ifnet *ifp)
1491 1.1 cgd {
1492 1.61 augustss struct ifaddr *ifa;
1493 1.1 cgd
1494 1.1 cgd ifp->if_flags &= ~IFF_UP;
1495 1.232 christos nanotime(&ifp->if_lastchange);
1496 1.204 dyoung IFADDR_FOREACH(ifa, ifp)
1497 1.1 cgd pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
1498 1.78 thorpej IFQ_PURGE(&ifp->if_snd);
1499 1.166 liamjfoy #if NCARP > 0
1500 1.166 liamjfoy if (ifp->if_carp)
1501 1.166 liamjfoy carp_carpdev_state(ifp);
1502 1.166 liamjfoy #endif
1503 1.15 mycroft rt_ifmsg(ifp);
1504 1.263 roy #ifdef INET6
1505 1.270 pooka if (in6_present)
1506 1.270 pooka in6_if_down(ifp);
1507 1.263 roy #endif
1508 1.15 mycroft }
1509 1.15 mycroft
1510 1.15 mycroft /*
1511 1.15 mycroft * Mark an interface up and notify protocols of
1512 1.15 mycroft * the transition.
1513 1.23 mycroft * NOTE: must be called at splsoftnet or equivalent.
1514 1.15 mycroft */
1515 1.15 mycroft void
1516 1.163 thorpej if_up(struct ifnet *ifp)
1517 1.15 mycroft {
1518 1.24 christos #ifdef notyet
1519 1.61 augustss struct ifaddr *ifa;
1520 1.24 christos #endif
1521 1.15 mycroft
1522 1.15 mycroft ifp->if_flags |= IFF_UP;
1523 1.232 christos nanotime(&ifp->if_lastchange);
1524 1.15 mycroft #ifdef notyet
1525 1.15 mycroft /* this has no effect on IP, and will kill all ISO connections XXX */
1526 1.204 dyoung IFADDR_FOREACH(ifa, ifp)
1527 1.15 mycroft pfctlinput(PRC_IFUP, ifa->ifa_addr);
1528 1.15 mycroft #endif
1529 1.166 liamjfoy #if NCARP > 0
1530 1.166 liamjfoy if (ifp->if_carp)
1531 1.166 liamjfoy carp_carpdev_state(ifp);
1532 1.166 liamjfoy #endif
1533 1.15 mycroft rt_ifmsg(ifp);
1534 1.49 itojun #ifdef INET6
1535 1.270 pooka if (in6_present)
1536 1.270 pooka in6_if_up(ifp);
1537 1.49 itojun #endif
1538 1.1 cgd }
1539 1.1 cgd
1540 1.1 cgd /*
1541 1.296 ozaki * Handle interface slowtimo timer routine. Called
1542 1.296 ozaki * from softclock, we decrement timer (if set) and
1543 1.1 cgd * call the appropriate interface routine on expiration.
1544 1.1 cgd */
1545 1.294 ozaki static void
1546 1.177 christos if_slowtimo(void *arg)
1547 1.1 cgd {
1548 1.306 martin void (*slowtimo)(struct ifnet *);
1549 1.296 ozaki struct ifnet *ifp = arg;
1550 1.305 martin int s;
1551 1.1 cgd
1552 1.306 martin slowtimo = ifp->if_slowtimo;
1553 1.306 martin if (__predict_false(slowtimo == NULL))
1554 1.305 martin return;
1555 1.296 ozaki
1556 1.305 martin s = splnet();
1557 1.296 ozaki if (ifp->if_timer != 0 && --ifp->if_timer == 0)
1558 1.306 martin (*slowtimo)(ifp);
1559 1.296 ozaki
1560 1.1 cgd splx(s);
1561 1.305 martin
1562 1.305 martin if (__predict_true(ifp->if_slowtimo != NULL))
1563 1.305 martin callout_schedule(ifp->if_slowtimo_ch, hz / IFNET_SLOWHZ);
1564 1.65 thorpej }
1565 1.65 thorpej
1566 1.65 thorpej /*
1567 1.65 thorpej * Set/clear promiscuous mode on interface ifp based on the truth value
1568 1.65 thorpej * of pswitch. The calls are reference counted so that only the first
1569 1.65 thorpej * "on" request actually has an effect, as does the final "off" request.
1570 1.65 thorpej * Results are undefined if the "off" and "on" requests are not matched.
1571 1.65 thorpej */
1572 1.65 thorpej int
1573 1.163 thorpej ifpromisc(struct ifnet *ifp, int pswitch)
1574 1.65 thorpej {
1575 1.65 thorpej int pcount, ret;
1576 1.259 dyoung short nflags;
1577 1.65 thorpej
1578 1.65 thorpej pcount = ifp->if_pcount;
1579 1.65 thorpej if (pswitch) {
1580 1.65 thorpej /*
1581 1.71 thorpej * Allow the device to be "placed" into promiscuous
1582 1.71 thorpej * mode even if it is not configured up. It will
1583 1.242 mbalmer * consult IFF_PROMISC when it is brought up.
1584 1.65 thorpej */
1585 1.68 pk if (ifp->if_pcount++ != 0)
1586 1.185 dyoung return 0;
1587 1.252 dyoung nflags = ifp->if_flags | IFF_PROMISC;
1588 1.65 thorpej } else {
1589 1.65 thorpej if (--ifp->if_pcount > 0)
1590 1.185 dyoung return 0;
1591 1.252 dyoung nflags = ifp->if_flags & ~IFF_PROMISC;
1592 1.65 thorpej }
1593 1.252 dyoung ret = if_flags_set(ifp, nflags);
1594 1.65 thorpej /* Restore interface state if not successful. */
1595 1.65 thorpej if (ret != 0) {
1596 1.65 thorpej ifp->if_pcount = pcount;
1597 1.65 thorpej }
1598 1.185 dyoung return ret;
1599 1.1 cgd }
1600 1.1 cgd
1601 1.1 cgd /*
1602 1.1 cgd * Map interface name to
1603 1.1 cgd * interface structure pointer.
1604 1.1 cgd */
1605 1.1 cgd struct ifnet *
1606 1.163 thorpej ifunit(const char *name)
1607 1.1 cgd {
1608 1.61 augustss struct ifnet *ifp;
1609 1.105 matt const char *cp = name;
1610 1.105 matt u_int unit = 0;
1611 1.105 matt u_int i;
1612 1.105 matt
1613 1.105 matt /*
1614 1.105 matt * If the entire name is a number, treat it as an ifindex.
1615 1.105 matt */
1616 1.105 matt for (i = 0; i < IFNAMSIZ && *cp >= '0' && *cp <= '9'; i++, cp++) {
1617 1.105 matt unit = unit * 10 + (*cp - '0');
1618 1.105 matt }
1619 1.105 matt
1620 1.105 matt /*
1621 1.105 matt * If the number took all of the name, then it's a valid ifindex.
1622 1.105 matt */
1623 1.105 matt if (i == IFNAMSIZ || (cp != name && *cp == '\0')) {
1624 1.137 itojun if (unit >= if_indexlim)
1625 1.185 dyoung return NULL;
1626 1.105 matt ifp = ifindex2ifnet[unit];
1627 1.105 matt if (ifp == NULL || ifp->if_output == if_nulloutput)
1628 1.185 dyoung return NULL;
1629 1.185 dyoung return ifp;
1630 1.105 matt }
1631 1.34 thorpej
1632 1.185 dyoung IFNET_FOREACH(ifp) {
1633 1.53 thorpej if (ifp->if_output == if_nulloutput)
1634 1.53 thorpej continue;
1635 1.53 thorpej if (strcmp(ifp->if_xname, name) == 0)
1636 1.185 dyoung return ifp;
1637 1.53 thorpej }
1638 1.185 dyoung return NULL;
1639 1.1 cgd }
1640 1.49 itojun
1641 1.250 rmind ifnet_t *
1642 1.250 rmind if_byindex(u_int idx)
1643 1.250 rmind {
1644 1.250 rmind return (idx < if_indexlim) ? ifindex2ifnet[idx] : NULL;
1645 1.250 rmind }
1646 1.250 rmind
1647 1.211 dyoung /* common */
1648 1.215 dyoung int
1649 1.215 dyoung ifioctl_common(struct ifnet *ifp, u_long cmd, void *data)
1650 1.211 dyoung {
1651 1.224 dyoung int s;
1652 1.215 dyoung struct ifreq *ifr;
1653 1.215 dyoung struct ifcapreq *ifcr;
1654 1.215 dyoung struct ifdatareq *ifdr;
1655 1.211 dyoung
1656 1.211 dyoung switch (cmd) {
1657 1.211 dyoung case SIOCSIFCAP:
1658 1.215 dyoung ifcr = data;
1659 1.211 dyoung if ((ifcr->ifcr_capenable & ~ifp->if_capabilities) != 0)
1660 1.211 dyoung return EINVAL;
1661 1.211 dyoung
1662 1.213 dyoung if (ifcr->ifcr_capenable == ifp->if_capenable)
1663 1.213 dyoung return 0;
1664 1.211 dyoung
1665 1.213 dyoung ifp->if_capenable = ifcr->ifcr_capenable;
1666 1.211 dyoung
1667 1.213 dyoung /* Pre-compute the checksum flags mask. */
1668 1.213 dyoung ifp->if_csum_flags_tx = 0;
1669 1.213 dyoung ifp->if_csum_flags_rx = 0;
1670 1.213 dyoung if (ifp->if_capenable & IFCAP_CSUM_IPv4_Tx) {
1671 1.213 dyoung ifp->if_csum_flags_tx |= M_CSUM_IPv4;
1672 1.213 dyoung }
1673 1.213 dyoung if (ifp->if_capenable & IFCAP_CSUM_IPv4_Rx) {
1674 1.213 dyoung ifp->if_csum_flags_rx |= M_CSUM_IPv4;
1675 1.213 dyoung }
1676 1.211 dyoung
1677 1.213 dyoung if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Tx) {
1678 1.213 dyoung ifp->if_csum_flags_tx |= M_CSUM_TCPv4;
1679 1.213 dyoung }
1680 1.213 dyoung if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Rx) {
1681 1.213 dyoung ifp->if_csum_flags_rx |= M_CSUM_TCPv4;
1682 1.213 dyoung }
1683 1.211 dyoung
1684 1.213 dyoung if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Tx) {
1685 1.213 dyoung ifp->if_csum_flags_tx |= M_CSUM_UDPv4;
1686 1.213 dyoung }
1687 1.213 dyoung if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Rx) {
1688 1.213 dyoung ifp->if_csum_flags_rx |= M_CSUM_UDPv4;
1689 1.213 dyoung }
1690 1.211 dyoung
1691 1.213 dyoung if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Tx) {
1692 1.213 dyoung ifp->if_csum_flags_tx |= M_CSUM_TCPv6;
1693 1.213 dyoung }
1694 1.213 dyoung if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Rx) {
1695 1.213 dyoung ifp->if_csum_flags_rx |= M_CSUM_TCPv6;
1696 1.213 dyoung }
1697 1.211 dyoung
1698 1.213 dyoung if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Tx) {
1699 1.213 dyoung ifp->if_csum_flags_tx |= M_CSUM_UDPv6;
1700 1.211 dyoung }
1701 1.213 dyoung if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Rx) {
1702 1.213 dyoung ifp->if_csum_flags_rx |= M_CSUM_UDPv6;
1703 1.213 dyoung }
1704 1.215 dyoung if (ifp->if_flags & IFF_UP)
1705 1.215 dyoung return ENETRESET;
1706 1.215 dyoung return 0;
1707 1.211 dyoung case SIOCSIFFLAGS:
1708 1.215 dyoung ifr = data;
1709 1.211 dyoung if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) {
1710 1.211 dyoung s = splnet();
1711 1.211 dyoung if_down(ifp);
1712 1.211 dyoung splx(s);
1713 1.211 dyoung }
1714 1.211 dyoung if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) {
1715 1.211 dyoung s = splnet();
1716 1.211 dyoung if_up(ifp);
1717 1.211 dyoung splx(s);
1718 1.211 dyoung }
1719 1.211 dyoung ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1720 1.211 dyoung (ifr->ifr_flags &~ IFF_CANTCHANGE);
1721 1.211 dyoung break;
1722 1.211 dyoung case SIOCGIFFLAGS:
1723 1.215 dyoung ifr = data;
1724 1.211 dyoung ifr->ifr_flags = ifp->if_flags;
1725 1.211 dyoung break;
1726 1.211 dyoung
1727 1.211 dyoung case SIOCGIFMETRIC:
1728 1.215 dyoung ifr = data;
1729 1.211 dyoung ifr->ifr_metric = ifp->if_metric;
1730 1.211 dyoung break;
1731 1.211 dyoung
1732 1.211 dyoung case SIOCGIFMTU:
1733 1.215 dyoung ifr = data;
1734 1.211 dyoung ifr->ifr_mtu = ifp->if_mtu;
1735 1.211 dyoung break;
1736 1.211 dyoung
1737 1.211 dyoung case SIOCGIFDLT:
1738 1.215 dyoung ifr = data;
1739 1.211 dyoung ifr->ifr_dlt = ifp->if_dlt;
1740 1.211 dyoung break;
1741 1.211 dyoung
1742 1.211 dyoung case SIOCGIFCAP:
1743 1.215 dyoung ifcr = data;
1744 1.211 dyoung ifcr->ifcr_capabilities = ifp->if_capabilities;
1745 1.211 dyoung ifcr->ifcr_capenable = ifp->if_capenable;
1746 1.211 dyoung break;
1747 1.211 dyoung
1748 1.211 dyoung case SIOCSIFMETRIC:
1749 1.215 dyoung ifr = data;
1750 1.211 dyoung ifp->if_metric = ifr->ifr_metric;
1751 1.211 dyoung break;
1752 1.211 dyoung
1753 1.211 dyoung case SIOCGIFDATA:
1754 1.215 dyoung ifdr = data;
1755 1.211 dyoung ifdr->ifdr_data = ifp->if_data;
1756 1.211 dyoung break;
1757 1.211 dyoung
1758 1.266 christos case SIOCGIFINDEX:
1759 1.266 christos ifr = data;
1760 1.266 christos ifr->ifr_index = ifp->if_index;
1761 1.266 christos break;
1762 1.266 christos
1763 1.211 dyoung case SIOCZIFDATA:
1764 1.215 dyoung ifdr = data;
1765 1.211 dyoung ifdr->ifdr_data = ifp->if_data;
1766 1.211 dyoung /*
1767 1.211 dyoung * Assumes that the volatile counters that can be
1768 1.211 dyoung * zero'ed are at the end of if_data.
1769 1.211 dyoung */
1770 1.211 dyoung memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) -
1771 1.211 dyoung offsetof(struct if_data, ifi_ipackets));
1772 1.261 msaitoh /*
1773 1.261 msaitoh * The memset() clears to the bottm of if_data. In the area,
1774 1.261 msaitoh * if_lastchange is included. Please be careful if new entry
1775 1.261 msaitoh * will be added into if_data or rewite this.
1776 1.261 msaitoh *
1777 1.261 msaitoh * And also, update if_lastchnage.
1778 1.261 msaitoh */
1779 1.261 msaitoh getnanotime(&ifp->if_lastchange);
1780 1.211 dyoung break;
1781 1.215 dyoung case SIOCSIFMTU:
1782 1.215 dyoung ifr = data;
1783 1.215 dyoung if (ifp->if_mtu == ifr->ifr_mtu)
1784 1.215 dyoung break;
1785 1.215 dyoung ifp->if_mtu = ifr->ifr_mtu;
1786 1.215 dyoung /*
1787 1.215 dyoung * If the link MTU changed, do network layer specific procedure.
1788 1.215 dyoung */
1789 1.215 dyoung #ifdef INET6
1790 1.271 pooka if (in6_present)
1791 1.271 pooka nd6_setmtu(ifp);
1792 1.215 dyoung #endif
1793 1.215 dyoung return ENETRESET;
1794 1.211 dyoung default:
1795 1.223 dyoung return ENOTTY;
1796 1.211 dyoung }
1797 1.211 dyoung return 0;
1798 1.211 dyoung }
1799 1.211 dyoung
1800 1.235 dyoung int
1801 1.284 rtr ifaddrpref_ioctl(struct socket *so, u_long cmd, void *data, struct ifnet *ifp)
1802 1.235 dyoung {
1803 1.235 dyoung struct if_addrprefreq *ifap = (struct if_addrprefreq *)data;
1804 1.235 dyoung struct ifaddr *ifa;
1805 1.235 dyoung const struct sockaddr *any, *sa;
1806 1.235 dyoung union {
1807 1.235 dyoung struct sockaddr sa;
1808 1.235 dyoung struct sockaddr_storage ss;
1809 1.236 jakllsch } u, v;
1810 1.235 dyoung
1811 1.235 dyoung switch (cmd) {
1812 1.235 dyoung case SIOCSIFADDRPREF:
1813 1.284 rtr if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_INTERFACE,
1814 1.235 dyoung KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd,
1815 1.235 dyoung NULL) != 0)
1816 1.235 dyoung return EPERM;
1817 1.235 dyoung case SIOCGIFADDRPREF:
1818 1.235 dyoung break;
1819 1.235 dyoung default:
1820 1.235 dyoung return EOPNOTSUPP;
1821 1.235 dyoung }
1822 1.235 dyoung
1823 1.235 dyoung /* sanity checks */
1824 1.235 dyoung if (data == NULL || ifp == NULL) {
1825 1.235 dyoung panic("invalid argument to %s", __func__);
1826 1.235 dyoung /*NOTREACHED*/
1827 1.235 dyoung }
1828 1.235 dyoung
1829 1.235 dyoung /* address must be specified on ADD and DELETE */
1830 1.235 dyoung sa = sstocsa(&ifap->ifap_addr);
1831 1.235 dyoung if (sa->sa_family != sofamily(so))
1832 1.235 dyoung return EINVAL;
1833 1.235 dyoung if ((any = sockaddr_any(sa)) == NULL || sa->sa_len != any->sa_len)
1834 1.235 dyoung return EINVAL;
1835 1.235 dyoung
1836 1.236 jakllsch sockaddr_externalize(&v.sa, sizeof(v.ss), sa);
1837 1.236 jakllsch
1838 1.235 dyoung IFADDR_FOREACH(ifa, ifp) {
1839 1.235 dyoung if (ifa->ifa_addr->sa_family != sa->sa_family)
1840 1.235 dyoung continue;
1841 1.235 dyoung sockaddr_externalize(&u.sa, sizeof(u.ss), ifa->ifa_addr);
1842 1.236 jakllsch if (sockaddr_cmp(&u.sa, &v.sa) == 0)
1843 1.235 dyoung break;
1844 1.235 dyoung }
1845 1.235 dyoung if (ifa == NULL)
1846 1.235 dyoung return EADDRNOTAVAIL;
1847 1.235 dyoung
1848 1.235 dyoung switch (cmd) {
1849 1.235 dyoung case SIOCSIFADDRPREF:
1850 1.235 dyoung ifa->ifa_preference = ifap->ifap_preference;
1851 1.235 dyoung return 0;
1852 1.235 dyoung case SIOCGIFADDRPREF:
1853 1.235 dyoung /* fill in the if_laddrreq structure */
1854 1.235 dyoung (void)sockaddr_copy(sstosa(&ifap->ifap_addr),
1855 1.235 dyoung sizeof(ifap->ifap_addr), ifa->ifa_addr);
1856 1.235 dyoung ifap->ifap_preference = ifa->ifa_preference;
1857 1.235 dyoung return 0;
1858 1.235 dyoung default:
1859 1.235 dyoung return EOPNOTSUPP;
1860 1.235 dyoung }
1861 1.235 dyoung }
1862 1.235 dyoung
1863 1.253 dyoung static void
1864 1.254 dyoung ifnet_lock_enter(struct ifnet_lock *il)
1865 1.253 dyoung {
1866 1.254 dyoung uint64_t *nenter;
1867 1.254 dyoung
1868 1.255 dyoung /* Before trying to acquire the mutex, increase the count of threads
1869 1.255 dyoung * who have entered or who wait to enter the critical section.
1870 1.255 dyoung * Avoid one costly locked memory transaction by keeping a count for
1871 1.255 dyoung * each CPU.
1872 1.255 dyoung */
1873 1.254 dyoung nenter = percpu_getref(il->il_nenter);
1874 1.253 dyoung (*nenter)++;
1875 1.254 dyoung percpu_putref(il->il_nenter);
1876 1.254 dyoung mutex_enter(&il->il_lock);
1877 1.253 dyoung }
1878 1.253 dyoung
1879 1.253 dyoung static void
1880 1.254 dyoung ifnet_lock_exit(struct ifnet_lock *il)
1881 1.253 dyoung {
1882 1.255 dyoung /* Increase the count of threads who have exited the critical
1883 1.255 dyoung * section. Increase while we still hold the lock.
1884 1.255 dyoung */
1885 1.254 dyoung il->il_nexit++;
1886 1.254 dyoung mutex_exit(&il->il_lock);
1887 1.253 dyoung }
1888 1.253 dyoung
1889 1.1 cgd /*
1890 1.1 cgd * Interface ioctls.
1891 1.1 cgd */
1892 1.273 pooka static int
1893 1.273 pooka doifioctl(struct socket *so, u_long cmd, void *data, struct lwp *l)
1894 1.1 cgd {
1895 1.61 augustss struct ifnet *ifp;
1896 1.61 augustss struct ifreq *ifr;
1897 1.217 martin int error = 0;
1898 1.191 christos #if defined(COMPAT_OSOCK) || defined(COMPAT_OIFREQ)
1899 1.191 christos u_long ocmd = cmd;
1900 1.191 christos #endif
1901 1.49 itojun short oif_flags;
1902 1.186 christos #ifdef COMPAT_OIFREQ
1903 1.186 christos struct ifreq ifrb;
1904 1.187 xtraeme struct oifreq *oifr = NULL;
1905 1.186 christos #endif
1906 1.292 christos int r;
1907 1.1 cgd
1908 1.1 cgd switch (cmd) {
1909 1.186 christos #ifdef COMPAT_OIFREQ
1910 1.186 christos case OSIOCGIFCONF:
1911 1.186 christos case OOSIOCGIFCONF:
1912 1.186 christos return compat_ifconf(cmd, data);
1913 1.186 christos #endif
1914 1.232 christos #ifdef COMPAT_OIFDATA
1915 1.232 christos case OSIOCGIFDATA:
1916 1.232 christos case OSIOCZIFDATA:
1917 1.232 christos return compat_ifdatareq(l, cmd, data);
1918 1.232 christos #endif
1919 1.1 cgd case SIOCGIFCONF:
1920 1.185 dyoung return ifconf(cmd, data);
1921 1.231 dyoung case SIOCINITIFADDR:
1922 1.231 dyoung return EPERM;
1923 1.1 cgd }
1924 1.191 christos
1925 1.186 christos #ifdef COMPAT_OIFREQ
1926 1.196 skd cmd = compat_cvtcmd(cmd);
1927 1.186 christos if (cmd != ocmd) {
1928 1.186 christos oifr = data;
1929 1.186 christos data = ifr = &ifrb;
1930 1.186 christos ifreqo2n(oifr, ifr);
1931 1.186 christos } else
1932 1.186 christos #endif
1933 1.186 christos ifr = data;
1934 1.63 thorpej
1935 1.174 elad ifp = ifunit(ifr->ifr_name);
1936 1.174 elad
1937 1.63 thorpej switch (cmd) {
1938 1.63 thorpej case SIOCIFCREATE:
1939 1.63 thorpej case SIOCIFDESTROY:
1940 1.185 dyoung if (l != NULL) {
1941 1.174 elad error = kauth_authorize_network(l->l_cred,
1942 1.174 elad KAUTH_NETWORK_INTERFACE,
1943 1.174 elad KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp,
1944 1.174 elad (void *)cmd, NULL);
1945 1.185 dyoung if (error != 0)
1946 1.151 yamt return error;
1947 1.151 yamt }
1948 1.292 christos mutex_enter(&if_clone_mtx);
1949 1.292 christos r = (cmd == SIOCIFCREATE) ?
1950 1.64 thorpej if_clone_create(ifr->ifr_name) :
1951 1.185 dyoung if_clone_destroy(ifr->ifr_name);
1952 1.292 christos mutex_exit(&if_clone_mtx);
1953 1.292 christos return r;
1954 1.67 thorpej
1955 1.67 thorpej case SIOCIFGCLONERS:
1956 1.185 dyoung return if_clone_list((struct if_clonereq *)data);
1957 1.63 thorpej }
1958 1.63 thorpej
1959 1.185 dyoung if (ifp == NULL)
1960 1.185 dyoung return ENXIO;
1961 1.151 yamt
1962 1.151 yamt switch (cmd) {
1963 1.233 christos case SIOCALIFADDR:
1964 1.233 christos case SIOCDLIFADDR:
1965 1.233 christos case SIOCSIFADDRPREF:
1966 1.151 yamt case SIOCSIFFLAGS:
1967 1.151 yamt case SIOCSIFCAP:
1968 1.151 yamt case SIOCSIFMETRIC:
1969 1.151 yamt case SIOCZIFDATA:
1970 1.151 yamt case SIOCSIFMTU:
1971 1.151 yamt case SIOCSIFPHYADDR:
1972 1.151 yamt case SIOCDIFPHYADDR:
1973 1.151 yamt #ifdef INET6
1974 1.151 yamt case SIOCSIFPHYADDR_IN6:
1975 1.151 yamt #endif
1976 1.151 yamt case SIOCSLIFPHYADDR:
1977 1.151 yamt case SIOCADDMULTI:
1978 1.151 yamt case SIOCDELMULTI:
1979 1.151 yamt case SIOCSIFMEDIA:
1980 1.154 perry case SIOCSDRVSPEC:
1981 1.196 skd case SIOCG80211:
1982 1.196 skd case SIOCS80211:
1983 1.151 yamt case SIOCS80211NWID:
1984 1.151 yamt case SIOCS80211NWKEY:
1985 1.151 yamt case SIOCS80211POWER:
1986 1.151 yamt case SIOCS80211BSSID:
1987 1.151 yamt case SIOCS80211CHANNEL:
1988 1.249 pooka case SIOCSLINKSTR:
1989 1.185 dyoung if (l != NULL) {
1990 1.174 elad error = kauth_authorize_network(l->l_cred,
1991 1.174 elad KAUTH_NETWORK_INTERFACE,
1992 1.174 elad KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp,
1993 1.174 elad (void *)cmd, NULL);
1994 1.185 dyoung if (error != 0)
1995 1.151 yamt return error;
1996 1.151 yamt }
1997 1.151 yamt }
1998 1.151 yamt
1999 1.49 itojun oif_flags = ifp->if_flags;
2000 1.1 cgd
2001 1.254 dyoung ifnet_lock_enter(ifp->if_ioctl_lock);
2002 1.231 dyoung error = (*ifp->if_ioctl)(ifp, cmd, data);
2003 1.231 dyoung if (error != ENOTTY)
2004 1.231 dyoung ;
2005 1.231 dyoung else if (so->so_proto == NULL)
2006 1.252 dyoung error = EOPNOTSUPP;
2007 1.231 dyoung else {
2008 1.161 christos #ifdef COMPAT_OSOCK
2009 1.186 christos error = compat_ifioctl(so, ocmd, cmd, data, l);
2010 1.161 christos #else
2011 1.283 rtr error = (*so->so_proto->pr_usrreqs->pr_ioctl)(so,
2012 1.284 rtr cmd, data, ifp);
2013 1.1 cgd #endif
2014 1.49 itojun }
2015 1.1 cgd
2016 1.49 itojun if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) {
2017 1.49 itojun #ifdef INET6
2018 1.270 pooka if (in6_present && (ifp->if_flags & IFF_UP) != 0) {
2019 1.217 martin int s = splnet();
2020 1.49 itojun in6_if_up(ifp);
2021 1.49 itojun splx(s);
2022 1.49 itojun }
2023 1.1 cgd #endif
2024 1.1 cgd }
2025 1.186 christos #ifdef COMPAT_OIFREQ
2026 1.186 christos if (cmd != ocmd)
2027 1.246 christos ifreqn2o(oifr, ifr);
2028 1.186 christos #endif
2029 1.49 itojun
2030 1.254 dyoung ifnet_lock_exit(ifp->if_ioctl_lock);
2031 1.185 dyoung return error;
2032 1.1 cgd }
2033 1.1 cgd
2034 1.255 dyoung /* This callback adds to the sum in `arg' the number of
2035 1.255 dyoung * threads on `ci' who have entered or who wait to enter the
2036 1.255 dyoung * critical section.
2037 1.255 dyoung */
2038 1.252 dyoung static void
2039 1.254 dyoung ifnet_lock_sum(void *p, void *arg, struct cpu_info *ci)
2040 1.252 dyoung {
2041 1.252 dyoung uint64_t *sum = arg, *nenter = p;
2042 1.252 dyoung
2043 1.252 dyoung *sum += *nenter;
2044 1.252 dyoung }
2045 1.252 dyoung
2046 1.255 dyoung /* Return the number of threads who have entered or who wait
2047 1.255 dyoung * to enter the critical section on all CPUs.
2048 1.255 dyoung */
2049 1.252 dyoung static uint64_t
2050 1.254 dyoung ifnet_lock_entrances(struct ifnet_lock *il)
2051 1.252 dyoung {
2052 1.252 dyoung uint64_t sum = 0;
2053 1.252 dyoung
2054 1.254 dyoung percpu_foreach(il->il_nenter, ifnet_lock_sum, &sum);
2055 1.252 dyoung
2056 1.252 dyoung return sum;
2057 1.252 dyoung }
2058 1.252 dyoung
2059 1.252 dyoung static int
2060 1.252 dyoung ifioctl_attach(struct ifnet *ifp)
2061 1.252 dyoung {
2062 1.254 dyoung struct ifnet_lock *il;
2063 1.254 dyoung
2064 1.255 dyoung /* If the driver has not supplied its own if_ioctl, then
2065 1.255 dyoung * supply the default.
2066 1.255 dyoung */
2067 1.252 dyoung if (ifp->if_ioctl == NULL)
2068 1.252 dyoung ifp->if_ioctl = ifioctl_common;
2069 1.252 dyoung
2070 1.255 dyoung /* Create an ifnet_lock for synchronizing ifioctls. */
2071 1.254 dyoung if ((il = kmem_zalloc(sizeof(*il), KM_SLEEP)) == NULL)
2072 1.252 dyoung return ENOMEM;
2073 1.252 dyoung
2074 1.254 dyoung il->il_nenter = percpu_alloc(sizeof(uint64_t));
2075 1.254 dyoung if (il->il_nenter == NULL) {
2076 1.254 dyoung kmem_free(il, sizeof(*il));
2077 1.254 dyoung return ENOMEM;
2078 1.254 dyoung }
2079 1.254 dyoung
2080 1.254 dyoung mutex_init(&il->il_lock, MUTEX_DEFAULT, IPL_NONE);
2081 1.254 dyoung cv_init(&il->il_emptied, ifp->if_xname);
2082 1.254 dyoung
2083 1.254 dyoung ifp->if_ioctl_lock = il;
2084 1.252 dyoung
2085 1.252 dyoung return 0;
2086 1.252 dyoung }
2087 1.252 dyoung
2088 1.255 dyoung /*
2089 1.255 dyoung * This must not be called until after `ifp' has been withdrawn from the
2090 1.255 dyoung * ifnet tables so that ifioctl() cannot get a handle on it by calling
2091 1.255 dyoung * ifunit().
2092 1.255 dyoung */
2093 1.252 dyoung static void
2094 1.252 dyoung ifioctl_detach(struct ifnet *ifp)
2095 1.252 dyoung {
2096 1.254 dyoung struct ifnet_lock *il;
2097 1.254 dyoung
2098 1.254 dyoung il = ifp->if_ioctl_lock;
2099 1.254 dyoung mutex_enter(&il->il_lock);
2100 1.255 dyoung /* Install if_nullioctl to make sure that any thread that
2101 1.255 dyoung * subsequently enters the critical section will quit it
2102 1.255 dyoung * immediately and signal the condition variable that we
2103 1.255 dyoung * wait on, below.
2104 1.255 dyoung */
2105 1.252 dyoung ifp->if_ioctl = if_nullioctl;
2106 1.255 dyoung /* Sleep while threads are still in the critical section or
2107 1.255 dyoung * wait to enter it.
2108 1.255 dyoung */
2109 1.254 dyoung while (ifnet_lock_entrances(il) != il->il_nexit)
2110 1.254 dyoung cv_wait(&il->il_emptied, &il->il_lock);
2111 1.255 dyoung /* At this point, we are the only thread still in the critical
2112 1.255 dyoung * section, and no new thread can get a handle on the ifioctl
2113 1.255 dyoung * lock, so it is safe to free its memory.
2114 1.255 dyoung */
2115 1.254 dyoung mutex_exit(&il->il_lock);
2116 1.254 dyoung ifp->if_ioctl_lock = NULL;
2117 1.255 dyoung percpu_free(il->il_nenter, sizeof(uint64_t));
2118 1.255 dyoung il->il_nenter = NULL;
2119 1.258 jakllsch cv_destroy(&il->il_emptied);
2120 1.257 dyoung mutex_destroy(&il->il_lock);
2121 1.254 dyoung kmem_free(il, sizeof(*il));
2122 1.252 dyoung }
2123 1.252 dyoung
2124 1.1 cgd /*
2125 1.1 cgd * Return interface configuration
2126 1.1 cgd * of system. List may be used
2127 1.1 cgd * in later ioctl's (above) to get
2128 1.1 cgd * other information.
2129 1.200 gdt *
2130 1.200 gdt * Each record is a struct ifreq. Before the addition of
2131 1.200 gdt * sockaddr_storage, the API rule was that sockaddr flavors that did
2132 1.200 gdt * not fit would extend beyond the struct ifreq, with the next struct
2133 1.200 gdt * ifreq starting sa_len beyond the struct sockaddr. Because the
2134 1.200 gdt * union in struct ifreq includes struct sockaddr_storage, every kind
2135 1.200 gdt * of sockaddr must fit. Thus, there are no longer any overlength
2136 1.200 gdt * records.
2137 1.200 gdt *
2138 1.200 gdt * Records are added to the user buffer if they fit, and ifc_len is
2139 1.200 gdt * adjusted to the length that was written. Thus, the user is only
2140 1.200 gdt * assured of getting the complete list if ifc_len on return is at
2141 1.200 gdt * least sizeof(struct ifreq) less than it was on entry.
2142 1.200 gdt *
2143 1.200 gdt * If the user buffer pointer is NULL, this routine copies no data and
2144 1.200 gdt * returns the amount of space that would be needed.
2145 1.200 gdt *
2146 1.200 gdt * Invariants:
2147 1.200 gdt * ifrp points to the next part of the user's buffer to be used. If
2148 1.200 gdt * ifrp != NULL, space holds the number of bytes remaining that we may
2149 1.200 gdt * write at ifrp. Otherwise, space holds the number of bytes that
2150 1.200 gdt * would have been written had there been adequate space.
2151 1.1 cgd */
2152 1.1 cgd /*ARGSUSED*/
2153 1.302 ozaki static int
2154 1.183 christos ifconf(u_long cmd, void *data)
2155 1.1 cgd {
2156 1.61 augustss struct ifconf *ifc = (struct ifconf *)data;
2157 1.61 augustss struct ifnet *ifp;
2158 1.61 augustss struct ifaddr *ifa;
2159 1.304 ozaki struct ifreq ifr, *ifrp = NULL;
2160 1.304 ozaki int space = 0, error = 0;
2161 1.200 gdt const int sz = (int)sizeof(struct ifreq);
2162 1.304 ozaki const bool docopy = ifc->ifc_req != NULL;
2163 1.1 cgd
2164 1.304 ozaki if (docopy) {
2165 1.190 enami space = ifc->ifc_len;
2166 1.304 ozaki ifrp = ifc->ifc_req;
2167 1.304 ozaki }
2168 1.304 ozaki
2169 1.153 matt IFNET_FOREACH(ifp) {
2170 1.175 christos (void)strncpy(ifr.ifr_name, ifp->if_xname,
2171 1.173 christos sizeof(ifr.ifr_name));
2172 1.175 christos if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0')
2173 1.175 christos return ENAMETOOLONG;
2174 1.205 dyoung if (IFADDR_EMPTY(ifp)) {
2175 1.200 gdt /* Interface with no addresses - send zero sockaddr. */
2176 1.127 christos memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr));
2177 1.304 ozaki if (!docopy) {
2178 1.218 dyoung space += sz;
2179 1.218 dyoung continue;
2180 1.218 dyoung }
2181 1.218 dyoung if (space >= sz) {
2182 1.218 dyoung error = copyout(&ifr, ifrp, sz);
2183 1.218 dyoung if (error != 0)
2184 1.218 dyoung return error;
2185 1.218 dyoung ifrp++;
2186 1.218 dyoung space -= sz;
2187 1.70 mellon }
2188 1.127 christos }
2189 1.127 christos
2190 1.204 dyoung IFADDR_FOREACH(ifa, ifp) {
2191 1.61 augustss struct sockaddr *sa = ifa->ifa_addr;
2192 1.200 gdt /* all sockaddrs must fit in sockaddr_storage */
2193 1.200 gdt KASSERT(sa->sa_len <= sizeof(ifr.ifr_ifru));
2194 1.200 gdt
2195 1.304 ozaki if (!docopy) {
2196 1.218 dyoung space += sz;
2197 1.218 dyoung continue;
2198 1.218 dyoung }
2199 1.218 dyoung memcpy(&ifr.ifr_space, sa, sa->sa_len);
2200 1.218 dyoung if (space >= sz) {
2201 1.218 dyoung error = copyout(&ifr, ifrp, sz);
2202 1.218 dyoung if (error != 0)
2203 1.218 dyoung return (error);
2204 1.218 dyoung ifrp++; space -= sz;
2205 1.1 cgd }
2206 1.1 cgd }
2207 1.1 cgd }
2208 1.304 ozaki if (docopy) {
2209 1.200 gdt KASSERT(0 <= space && space <= ifc->ifc_len);
2210 1.127 christos ifc->ifc_len -= space;
2211 1.218 dyoung } else {
2212 1.200 gdt KASSERT(space >= 0);
2213 1.200 gdt ifc->ifc_len = space;
2214 1.200 gdt }
2215 1.190 enami return (0);
2216 1.1 cgd }
2217 1.133 jonathan
2218 1.198 dyoung int
2219 1.247 christos ifreq_setaddr(u_long cmd, struct ifreq *ifr, const struct sockaddr *sa)
2220 1.198 dyoung {
2221 1.198 dyoung uint8_t len;
2222 1.247 christos #ifdef COMPAT_OIFREQ
2223 1.247 christos struct ifreq ifrb;
2224 1.247 christos struct oifreq *oifr = NULL;
2225 1.247 christos u_long ocmd = cmd;
2226 1.247 christos cmd = compat_cvtcmd(cmd);
2227 1.247 christos if (cmd != ocmd) {
2228 1.247 christos oifr = (struct oifreq *)(void *)ifr;
2229 1.247 christos ifr = &ifrb;
2230 1.247 christos ifreqo2n(oifr, ifr);
2231 1.247 christos len = sizeof(oifr->ifr_addr);
2232 1.247 christos } else
2233 1.247 christos #endif
2234 1.247 christos len = sizeof(ifr->ifr_ifru.ifru_space);
2235 1.198 dyoung
2236 1.198 dyoung if (len < sa->sa_len)
2237 1.198 dyoung return EFBIG;
2238 1.247 christos
2239 1.241 joerg memset(&ifr->ifr_addr, 0, len);
2240 1.202 dyoung sockaddr_copy(&ifr->ifr_addr, len, sa);
2241 1.247 christos
2242 1.247 christos #ifdef COMPAT_OIFREQ
2243 1.247 christos if (cmd != ocmd)
2244 1.247 christos ifreqn2o(oifr, ifr);
2245 1.247 christos #endif
2246 1.198 dyoung return 0;
2247 1.198 dyoung }
2248 1.198 dyoung
2249 1.155 christos /*
2250 1.155 christos * Queue message on interface, and start output if interface
2251 1.155 christos * not yet active.
2252 1.155 christos */
2253 1.155 christos int
2254 1.155 christos ifq_enqueue(struct ifnet *ifp, struct mbuf *m
2255 1.155 christos ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr))
2256 1.155 christos {
2257 1.155 christos int len = m->m_pkthdr.len;
2258 1.155 christos int mflags = m->m_flags;
2259 1.155 christos int s = splnet();
2260 1.155 christos int error;
2261 1.155 christos
2262 1.156 christos IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error);
2263 1.185 dyoung if (error != 0)
2264 1.185 dyoung goto out;
2265 1.155 christos ifp->if_obytes += len;
2266 1.155 christos if (mflags & M_MCAST)
2267 1.155 christos ifp->if_omcasts++;
2268 1.155 christos if ((ifp->if_flags & IFF_OACTIVE) == 0)
2269 1.155 christos (*ifp->if_start)(ifp);
2270 1.185 dyoung out:
2271 1.155 christos splx(s);
2272 1.155 christos return error;
2273 1.155 christos }
2274 1.155 christos
2275 1.155 christos /*
2276 1.155 christos * Queue message on interface, possibly using a second fast queue
2277 1.155 christos */
2278 1.155 christos int
2279 1.155 christos ifq_enqueue2(struct ifnet *ifp, struct ifqueue *ifq, struct mbuf *m
2280 1.155 christos ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr))
2281 1.155 christos {
2282 1.155 christos int error = 0;
2283 1.155 christos
2284 1.155 christos if (ifq != NULL
2285 1.155 christos #ifdef ALTQ
2286 1.155 christos && ALTQ_IS_ENABLED(&ifp->if_snd) == 0
2287 1.155 christos #endif
2288 1.155 christos ) {
2289 1.155 christos if (IF_QFULL(ifq)) {
2290 1.155 christos IF_DROP(&ifp->if_snd);
2291 1.155 christos m_freem(m);
2292 1.155 christos if (error == 0)
2293 1.155 christos error = ENOBUFS;
2294 1.185 dyoung } else
2295 1.155 christos IF_ENQUEUE(ifq, m);
2296 1.155 christos } else
2297 1.156 christos IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error);
2298 1.155 christos if (error != 0) {
2299 1.155 christos ++ifp->if_oerrors;
2300 1.155 christos return error;
2301 1.155 christos }
2302 1.155 christos return 0;
2303 1.155 christos }
2304 1.155 christos
2305 1.252 dyoung int
2306 1.252 dyoung if_addr_init(ifnet_t *ifp, struct ifaddr *ifa, const bool src)
2307 1.252 dyoung {
2308 1.252 dyoung int rc;
2309 1.252 dyoung
2310 1.252 dyoung if (ifp->if_initaddr != NULL)
2311 1.252 dyoung rc = (*ifp->if_initaddr)(ifp, ifa, src);
2312 1.252 dyoung else if (src ||
2313 1.252 dyoung (rc = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, ifa)) == ENOTTY)
2314 1.252 dyoung rc = (*ifp->if_ioctl)(ifp, SIOCINITIFADDR, ifa);
2315 1.252 dyoung
2316 1.252 dyoung return rc;
2317 1.252 dyoung }
2318 1.252 dyoung
2319 1.252 dyoung int
2320 1.309 roy if_do_dad(struct ifnet *ifp)
2321 1.309 roy {
2322 1.309 roy if ((ifp->if_flags & IFF_LOOPBACK) != 0)
2323 1.309 roy return 0;
2324 1.309 roy
2325 1.309 roy switch (ifp->if_type) {
2326 1.309 roy case IFT_FAITH:
2327 1.309 roy /*
2328 1.309 roy * These interfaces do not have the IFF_LOOPBACK flag,
2329 1.309 roy * but loop packets back. We do not have to do DAD on such
2330 1.309 roy * interfaces. We should even omit it, because loop-backed
2331 1.309 roy * responses would confuse the DAD procedure.
2332 1.309 roy */
2333 1.309 roy return 0;
2334 1.309 roy default:
2335 1.309 roy /*
2336 1.309 roy * Our DAD routine requires the interface up and running.
2337 1.309 roy * However, some interfaces can be up before the RUNNING
2338 1.309 roy * status. Additionaly, users may try to assign addresses
2339 1.309 roy * before the interface becomes up (or running).
2340 1.309 roy * We simply skip DAD in such a case as a work around.
2341 1.309 roy * XXX: we should rather mark "tentative" on such addresses,
2342 1.309 roy * and do DAD after the interface becomes ready.
2343 1.309 roy */
2344 1.309 roy if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) !=
2345 1.309 roy (IFF_UP|IFF_RUNNING))
2346 1.309 roy return 0;
2347 1.309 roy
2348 1.309 roy return 1;
2349 1.309 roy }
2350 1.309 roy }
2351 1.309 roy
2352 1.309 roy int
2353 1.252 dyoung if_flags_set(ifnet_t *ifp, const short flags)
2354 1.252 dyoung {
2355 1.252 dyoung int rc;
2356 1.252 dyoung
2357 1.252 dyoung if (ifp->if_setflags != NULL)
2358 1.252 dyoung rc = (*ifp->if_setflags)(ifp, flags);
2359 1.252 dyoung else {
2360 1.259 dyoung short cantflags, chgdflags;
2361 1.256 dyoung struct ifreq ifr;
2362 1.256 dyoung
2363 1.259 dyoung chgdflags = ifp->if_flags ^ flags;
2364 1.259 dyoung cantflags = chgdflags & IFF_CANTCHANGE;
2365 1.256 dyoung
2366 1.256 dyoung if (cantflags != 0)
2367 1.256 dyoung ifp->if_flags ^= cantflags;
2368 1.256 dyoung
2369 1.259 dyoung /* Traditionally, we do not call if_ioctl after
2370 1.259 dyoung * setting/clearing only IFF_PROMISC if the interface
2371 1.259 dyoung * isn't IFF_UP. Uphold that tradition.
2372 1.259 dyoung */
2373 1.259 dyoung if (chgdflags == IFF_PROMISC && (ifp->if_flags & IFF_UP) == 0)
2374 1.259 dyoung return 0;
2375 1.259 dyoung
2376 1.259 dyoung memset(&ifr, 0, sizeof(ifr));
2377 1.259 dyoung
2378 1.256 dyoung ifr.ifr_flags = flags & ~IFF_CANTCHANGE;
2379 1.252 dyoung rc = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, &ifr);
2380 1.256 dyoung
2381 1.256 dyoung if (rc != 0 && cantflags != 0)
2382 1.256 dyoung ifp->if_flags ^= cantflags;
2383 1.252 dyoung }
2384 1.252 dyoung
2385 1.252 dyoung return rc;
2386 1.252 dyoung }
2387 1.252 dyoung
2388 1.252 dyoung int
2389 1.252 dyoung if_mcast_op(ifnet_t *ifp, const unsigned long cmd, const struct sockaddr *sa)
2390 1.252 dyoung {
2391 1.252 dyoung int rc;
2392 1.252 dyoung struct ifreq ifr;
2393 1.252 dyoung
2394 1.252 dyoung if (ifp->if_mcastop != NULL)
2395 1.252 dyoung rc = (*ifp->if_mcastop)(ifp, cmd, sa);
2396 1.252 dyoung else {
2397 1.252 dyoung ifreq_setaddr(cmd, &ifr, sa);
2398 1.252 dyoung rc = (*ifp->if_ioctl)(ifp, cmd, &ifr);
2399 1.252 dyoung }
2400 1.252 dyoung
2401 1.252 dyoung return rc;
2402 1.252 dyoung }
2403 1.155 christos
2404 1.234 dyoung static void
2405 1.234 dyoung sysctl_sndq_setup(struct sysctllog **clog, const char *ifname,
2406 1.234 dyoung struct ifaltq *ifq)
2407 1.234 dyoung {
2408 1.234 dyoung const struct sysctlnode *cnode, *rnode;
2409 1.234 dyoung
2410 1.234 dyoung if (sysctl_createv(clog, 0, NULL, &rnode,
2411 1.234 dyoung CTLFLAG_PERMANENT,
2412 1.234 dyoung CTLTYPE_NODE, "interfaces",
2413 1.234 dyoung SYSCTL_DESCR("Per-interface controls"),
2414 1.234 dyoung NULL, 0, NULL, 0,
2415 1.272 pooka CTL_NET, CTL_CREATE, CTL_EOL) != 0)
2416 1.234 dyoung goto bad;
2417 1.234 dyoung
2418 1.234 dyoung if (sysctl_createv(clog, 0, &rnode, &rnode,
2419 1.234 dyoung CTLFLAG_PERMANENT,
2420 1.234 dyoung CTLTYPE_NODE, ifname,
2421 1.234 dyoung SYSCTL_DESCR("Interface controls"),
2422 1.234 dyoung NULL, 0, NULL, 0,
2423 1.234 dyoung CTL_CREATE, CTL_EOL) != 0)
2424 1.234 dyoung goto bad;
2425 1.234 dyoung
2426 1.234 dyoung if (sysctl_createv(clog, 0, &rnode, &rnode,
2427 1.234 dyoung CTLFLAG_PERMANENT,
2428 1.234 dyoung CTLTYPE_NODE, "sndq",
2429 1.234 dyoung SYSCTL_DESCR("Interface output queue controls"),
2430 1.234 dyoung NULL, 0, NULL, 0,
2431 1.234 dyoung CTL_CREATE, CTL_EOL) != 0)
2432 1.234 dyoung goto bad;
2433 1.234 dyoung
2434 1.234 dyoung if (sysctl_createv(clog, 0, &rnode, &cnode,
2435 1.234 dyoung CTLFLAG_PERMANENT,
2436 1.234 dyoung CTLTYPE_INT, "len",
2437 1.234 dyoung SYSCTL_DESCR("Current output queue length"),
2438 1.234 dyoung NULL, 0, &ifq->ifq_len, 0,
2439 1.234 dyoung CTL_CREATE, CTL_EOL) != 0)
2440 1.234 dyoung goto bad;
2441 1.234 dyoung
2442 1.234 dyoung if (sysctl_createv(clog, 0, &rnode, &cnode,
2443 1.234 dyoung CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
2444 1.234 dyoung CTLTYPE_INT, "maxlen",
2445 1.234 dyoung SYSCTL_DESCR("Maximum allowed output queue length"),
2446 1.234 dyoung NULL, 0, &ifq->ifq_maxlen, 0,
2447 1.234 dyoung CTL_CREATE, CTL_EOL) != 0)
2448 1.234 dyoung goto bad;
2449 1.234 dyoung
2450 1.234 dyoung if (sysctl_createv(clog, 0, &rnode, &cnode,
2451 1.234 dyoung CTLFLAG_PERMANENT,
2452 1.234 dyoung CTLTYPE_INT, "drops",
2453 1.234 dyoung SYSCTL_DESCR("Packets dropped due to full output queue"),
2454 1.234 dyoung NULL, 0, &ifq->ifq_drops, 0,
2455 1.234 dyoung CTL_CREATE, CTL_EOL) != 0)
2456 1.234 dyoung goto bad;
2457 1.234 dyoung
2458 1.234 dyoung return;
2459 1.234 dyoung bad:
2460 1.234 dyoung printf("%s: could not attach sysctl nodes\n", ifname);
2461 1.234 dyoung return;
2462 1.234 dyoung }
2463 1.234 dyoung
2464 1.138 drochner #if defined(INET) || defined(INET6)
2465 1.276 rmind
2466 1.276 rmind #define SYSCTL_NET_PKTQ(q, cn, c) \
2467 1.276 rmind static int \
2468 1.276 rmind sysctl_net_##q##_##cn(SYSCTLFN_ARGS) \
2469 1.276 rmind { \
2470 1.276 rmind return sysctl_pktq_count(SYSCTLFN_CALL(rnode), q, c); \
2471 1.276 rmind }
2472 1.276 rmind
2473 1.276 rmind #if defined(INET)
2474 1.279 rmind static int
2475 1.279 rmind sysctl_net_ip_pktq_maxlen(SYSCTLFN_ARGS)
2476 1.279 rmind {
2477 1.279 rmind return sysctl_pktq_maxlen(SYSCTLFN_CALL(rnode), ip_pktq);
2478 1.279 rmind }
2479 1.276 rmind SYSCTL_NET_PKTQ(ip_pktq, items, PKTQ_NITEMS)
2480 1.276 rmind SYSCTL_NET_PKTQ(ip_pktq, drops, PKTQ_DROPS)
2481 1.276 rmind #endif
2482 1.279 rmind
2483 1.276 rmind #if defined(INET6)
2484 1.279 rmind static int
2485 1.279 rmind sysctl_net_ip6_pktq_maxlen(SYSCTLFN_ARGS)
2486 1.279 rmind {
2487 1.279 rmind return sysctl_pktq_maxlen(SYSCTLFN_CALL(rnode), ip6_pktq);
2488 1.279 rmind }
2489 1.276 rmind SYSCTL_NET_PKTQ(ip6_pktq, items, PKTQ_NITEMS)
2490 1.276 rmind SYSCTL_NET_PKTQ(ip6_pktq, drops, PKTQ_DROPS)
2491 1.276 rmind #endif
2492 1.276 rmind
2493 1.136 atatat static void
2494 1.276 rmind sysctl_net_pktq_setup(struct sysctllog **clog, int pf)
2495 1.136 atatat {
2496 1.276 rmind sysctlfn len_func = NULL, maxlen_func = NULL, drops_func = NULL;
2497 1.276 rmind const char *pfname = NULL, *ipname = NULL;
2498 1.276 rmind int ipn = 0, qid = 0;
2499 1.276 rmind
2500 1.276 rmind switch (pf) {
2501 1.276 rmind #if defined(INET)
2502 1.276 rmind case PF_INET:
2503 1.276 rmind len_func = sysctl_net_ip_pktq_items;
2504 1.276 rmind maxlen_func = sysctl_net_ip_pktq_maxlen;
2505 1.276 rmind drops_func = sysctl_net_ip_pktq_drops;
2506 1.276 rmind pfname = "inet", ipn = IPPROTO_IP;
2507 1.276 rmind ipname = "ip", qid = IPCTL_IFQ;
2508 1.276 rmind break;
2509 1.276 rmind #endif
2510 1.276 rmind #if defined(INET6)
2511 1.276 rmind case PF_INET6:
2512 1.276 rmind len_func = sysctl_net_ip6_pktq_items;
2513 1.276 rmind maxlen_func = sysctl_net_ip6_pktq_maxlen;
2514 1.276 rmind drops_func = sysctl_net_ip6_pktq_drops;
2515 1.276 rmind pfname = "inet6", ipn = IPPROTO_IPV6;
2516 1.276 rmind ipname = "ip6", qid = IPV6CTL_IFQ;
2517 1.276 rmind break;
2518 1.276 rmind #endif
2519 1.276 rmind default:
2520 1.276 rmind KASSERT(false);
2521 1.276 rmind }
2522 1.136 atatat
2523 1.139 atatat sysctl_createv(clog, 0, NULL, NULL,
2524 1.139 atatat CTLFLAG_PERMANENT,
2525 1.136 atatat CTLTYPE_NODE, pfname, NULL,
2526 1.136 atatat NULL, 0, NULL, 0,
2527 1.136 atatat CTL_NET, pf, CTL_EOL);
2528 1.139 atatat sysctl_createv(clog, 0, NULL, NULL,
2529 1.139 atatat CTLFLAG_PERMANENT,
2530 1.136 atatat CTLTYPE_NODE, ipname, NULL,
2531 1.136 atatat NULL, 0, NULL, 0,
2532 1.136 atatat CTL_NET, pf, ipn, CTL_EOL);
2533 1.139 atatat sysctl_createv(clog, 0, NULL, NULL,
2534 1.139 atatat CTLFLAG_PERMANENT,
2535 1.142 atatat CTLTYPE_NODE, "ifq",
2536 1.142 atatat SYSCTL_DESCR("Protocol input queue controls"),
2537 1.139 atatat NULL, 0, NULL, 0,
2538 1.139 atatat CTL_NET, pf, ipn, qid, CTL_EOL);
2539 1.136 atatat
2540 1.139 atatat sysctl_createv(clog, 0, NULL, NULL,
2541 1.139 atatat CTLFLAG_PERMANENT,
2542 1.142 atatat CTLTYPE_INT, "len",
2543 1.142 atatat SYSCTL_DESCR("Current input queue length"),
2544 1.276 rmind len_func, 0, NULL, 0,
2545 1.136 atatat CTL_NET, pf, ipn, qid, IFQCTL_LEN, CTL_EOL);
2546 1.139 atatat sysctl_createv(clog, 0, NULL, NULL,
2547 1.139 atatat CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
2548 1.142 atatat CTLTYPE_INT, "maxlen",
2549 1.142 atatat SYSCTL_DESCR("Maximum allowed input queue length"),
2550 1.276 rmind maxlen_func, 0, NULL, 0,
2551 1.136 atatat CTL_NET, pf, ipn, qid, IFQCTL_MAXLEN, CTL_EOL);
2552 1.139 atatat sysctl_createv(clog, 0, NULL, NULL,
2553 1.139 atatat CTLFLAG_PERMANENT,
2554 1.142 atatat CTLTYPE_INT, "drops",
2555 1.142 atatat SYSCTL_DESCR("Packets dropped due to full input queue"),
2556 1.276 rmind drops_func, 0, NULL, 0,
2557 1.136 atatat CTL_NET, pf, ipn, qid, IFQCTL_DROPS, CTL_EOL);
2558 1.136 atatat }
2559 1.138 drochner #endif /* INET || INET6 */
2560 1.280 joerg
2561 1.280 joerg static int
2562 1.280 joerg if_sdl_sysctl(SYSCTLFN_ARGS)
2563 1.280 joerg {
2564 1.280 joerg struct ifnet *ifp;
2565 1.280 joerg const struct sockaddr_dl *sdl;
2566 1.280 joerg
2567 1.280 joerg if (namelen != 1)
2568 1.280 joerg return EINVAL;
2569 1.280 joerg
2570 1.280 joerg ifp = if_byindex(name[0]);
2571 1.280 joerg if (ifp == NULL)
2572 1.280 joerg return ENODEV;
2573 1.280 joerg
2574 1.280 joerg sdl = ifp->if_sadl;
2575 1.280 joerg if (sdl == NULL) {
2576 1.280 joerg *oldlenp = 0;
2577 1.280 joerg return 0;
2578 1.280 joerg }
2579 1.280 joerg
2580 1.280 joerg if (oldp == NULL) {
2581 1.280 joerg *oldlenp = sdl->sdl_alen;
2582 1.280 joerg return 0;
2583 1.280 joerg }
2584 1.280 joerg
2585 1.280 joerg if (*oldlenp >= sdl->sdl_alen)
2586 1.280 joerg *oldlenp = sdl->sdl_alen;
2587 1.280 joerg return sysctl_copyout(l, &sdl->sdl_data[sdl->sdl_nlen], oldp, *oldlenp);
2588 1.280 joerg }
2589 1.280 joerg
2590 1.280 joerg SYSCTL_SETUP(sysctl_net_sdl_setup, "sysctl net.sdl subtree setup")
2591 1.280 joerg {
2592 1.280 joerg const struct sysctlnode *rnode = NULL;
2593 1.280 joerg
2594 1.280 joerg sysctl_createv(clog, 0, NULL, &rnode,
2595 1.280 joerg CTLFLAG_PERMANENT,
2596 1.280 joerg CTLTYPE_NODE, "sdl",
2597 1.280 joerg SYSCTL_DESCR("Get active link-layer address"),
2598 1.280 joerg if_sdl_sysctl, 0, NULL, 0,
2599 1.280 joerg CTL_NET, CTL_CREATE, CTL_EOL);
2600 1.280 joerg }
2601